Notebookcheck

OUKITEL K7 Smartphone Review

Mike Wobker, 👁 Daniel Schmidt, Felicitas Krohn (translated by Alex Alderson), 08/13/2018

No battery problems. Another mid-range smartphone with a huge battery from China. This time it is the OUKITEL K7, which should have excellent battery life thanks to its 10,000-mAh battery. Find out in this review how the rest of the system shapes up.

Working For Notebookcheck

Are you a techie who knows how to write? Then join our Team!

Currently wanted: 
News Editor - Details here

OUKITEL K7

We have reviewed a few Oukitel smartphones in the last two years, ranging from the K10, with its large battery, to the rugged WP5000 and the more delicate K6000.

This time we are reviewing the OUKITEL K7, a device with a huge battery, a big display and a larger footprint. The K7 is equipped with mid-range hardware including a MediaTek MT6750 SoC, an ARM Mali-T860 MP2 GPU, 4 GB RAM and 64 GB of eMMC flash storage.

We have chosen to compare the K7 against the OUKITEL K10, the UleFone Power 5, the Blackview P10000 Pro and the Doogee BL9000. Our comparison devices all have large batteries like the K7.

Oukitel K7 (K Series)
Graphics adapter
Memory
4096 MB 
Display
6 inch 2:1, 2160 x 1080 pixel 402 PPI, Capacitive touchscreen, IPS, glossy: yes
Storage
64 GB eMMC Flash, 64 GB 
, 56 GB free
Connections
1 USB 2.0, Audio Connections: 3.5 mm jack, Card Reader: Up to 128 GB microSD cards, 1 Fingerprint Reader, Brightness Sensor, Sensors: Accelerometer, E-Compass, Fingerprint sensor, Gyroscope, Proximity sensor
Networking
802.11a/b/g/n (a/b/g/n), Bluetooth 4.0, GSM: 850, 900, 1,800, 1,900 MHz. WCDMA: 900, 2,100 MHz. LTE FDD Cat. 4: B1, B3, B7, B8, B20., Dual SIM, LTE, GPS
Size
height x width x depth (in mm): 14.5 x 168 x 78 ( = 0.57 x 6.61 x 3.07 in)
Battery
10000 mAh Lithium-Polymer
Operating System
Android 8.1 Oreo
Camera
Primary Camera: 13 MPix 13 MP & 2 MP Sony IMX214 sensor. Dual LED flash
Secondary Camera: 5 MPix
Additional features
Speakers: Single loudspeaker, Keyboard: Virtual keyboard, Keyboard Light: yes, USB charger, USB Type-A to Micro USB cable, USB On-The-Go (OTG) Adapter, Protective cover, SIM Tool, 12 Months Warranty, fanless
Weight
302 g ( = 10.65 oz / 0.67 pounds), Power Supply: 85 g ( = 3 oz / 0.19 pounds)
Price
190 Euro
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Case

The K7 is made from a very sturdy black plastic with a gold rim adorning the edges of the device. The power button and volume rocker are on the left-hand side of the device but rattle somewhat in their housings. By contrast, the SIM and microSD card slot sits firmly in place. The rear-mounted fingerprint sensor is placed below the dual rear-facing cameras and is easy to find when attempting to unlock the device.

The K7 measures 158 mm x 78 mm x 14.5 mm (~6.2 x 3.1 x 0.57 inches), which is thinner than most of our comparison devices, but still comparatively thick for a smartphone. The K7 weighs 302 g (~10.7 oz), which feels heavy in the hand and is second to the UleFone Power 5 of our comparison devices.

Size Comparison

Connectivity

The K7 is equipped with a MediaTek MT6750 SoC, an ARM Mali-T860 MP2 GPU, 4 GB RAM and 64 GB of eMMC flash storage. The K7 has a 6-inch display and a whopping 10,000-mAh battery. The K7 is a Dual-SIM device that supports up to 128 GB microSD cards. However, there is only space for two cards, so you will have to compromise between using two nano-SIMs or one nano-SIM and a microSD card.

OUKITEL has equipped the K7 with a Micro USB 2.0 port, which supports USB On-The-Go (OTG). There is also a 3.5 mm for wired audio playback.

Independent journalism is made possible by advertising. We show the least amount of ads whenever possible but we intentionally show more ads when an adblocker is used. Please, switch off ad blockers and support us!

Software

The K7 ships with Android Oreo 8.1, while our test device came with Android security patch level 5 April 2018. The K7 runs stock Android with no bloatware or additional manufacturer customization. The Google app suite that is pre-installed can be disabled but not uninstalled.

The K7 can format microSD cards as either external or internal storage, the latter of which allows you to store apps and data on the microSD card. The K7 supports multiple user accounts too.

Default app drawer
Default app drawer
Default app drawer
Default app drawer
Default home screen
Default home screen
Quick settings
Quick settings
Quick settings customisation
Quick settings customisation
Storage settings
Storage settings
About phone – Hardware info
About phone – Hardware info
About phone – Software info
About phone – Software info

Communication & GPS

The K7 can connect to either GSM, 3G or LTE mobile networks. The K7 even supports LTE band 20, which is often needed in rural areas of Germany, but not typically in China. The K7 also supports Bluetooth 4.0 and IEEE 802.11 a/b/g/n Wi-Fi networks.

Our test device achieves around 100 MBit/s in iperf3 Client Wi-Fi tests, which is on par with the better of our comparison devices. The K7 can connect to both 2.4 GHz and 5 GHz Wi-Fi networks, but transmissions speeds are relatively slow on the latter because of the lack of 802.11 ac Wi-Fi support.

Networking
iperf3 Client (receive) TCP 1 m 4M x10
Average of class Smartphone
  (5.9 - 939, n=307)
211 MBit/s ∼100% +105%
Doogee BL9000
Mali-G71 MP2, Helio P23 MT6763T, 64 GB eMMC Flash
105 MBit/s ∼50% +2%
Oukitel K7
Mali-T860 MP2, MT6750, 64 GB eMMC Flash
103 MBit/s ∼49%
Blackview P10000 Pro
Mali-G71 MP2, Helio P23 MT6763T, 64 GB eMMC Flash
101 MBit/s ∼48% -2%
Ulefone Power 5
Mali-G71 MP2, Helio P23 MT6763T, 64 GB eMMC Flash
76.8 MBit/s ∼36% -25%
Oukitel K10
Mali-G71 MP2, Helio P23 MT6763T, 64 GB eMMC Flash
53.4 MBit/s ∼25% -48%
iperf3 Client (transmit) TCP 1 m 4M x10
Average of class Smartphone
  (9.4 - 703, n=307)
207 MBit/s ∼100% +114%
Blackview P10000 Pro
Mali-G71 MP2, Helio P23 MT6763T, 64 GB eMMC Flash
109 MBit/s ∼53% +13%
Doogee BL9000
Mali-G71 MP2, Helio P23 MT6763T, 64 GB eMMC Flash
97.9 MBit/s ∼47% +1%
Oukitel K7
Mali-T860 MP2, MT6750, 64 GB eMMC Flash
96.8 MBit/s ∼47%
Ulefone Power 5
Mali-G71 MP2, Helio P23 MT6763T, 64 GB eMMC Flash
92.1 MBit/s ∼44% -5%
Oukitel K10
Mali-G71 MP2, Helio P23 MT6763T, 64 GB eMMC Flash
29.9 MBit/s ∼14% -69%
GPS test – outdoors
GPS test – outdoors
GPS test – indoors
GPS test – indoors

According to the GPS Test, our test device uses GPS and GLONASS for location services. This allows our test device to maintain a location accuracy of two meters (~6.6 feet) when using the device outdoors, which drops to six meters (~20.7 feet) when using the device indoors.

Our test device performed relatively well on our obligatory bike ride. We conduct this test to compare the location accuracy of our test devices against professional navigation devices like the Garmin Edge 500. Our test device deviated by 30 m (~100 feet/33 yards) over a 9.25 km (~5.75 miles) bike ride compared to the Garmin Edge 500, which is impressive given the K7’s price. However, our test device cannot maintain its two-meter (~6.6 feet) location accuracy while moving, particularly when cornering. Likewise, the K7 frequently struggled to accurately place us on the path on which we were cycling.

GPS test – OUKITEL K7 (Overview)
GPS test – OUKITEL K7 (Overview)
GPS test – OUKITEL K7 (Curves)
GPS test – OUKITEL K7 (Curves)
GPS test – OUKITEL K7 (Loop)
GPS test – OUKITEL K7 (Loop)
GPS test – Garmin Edge 500 (Overview)
GPS test – Garmin Edge 500 (Overview)
GPS test – Garmin Edge 500 (Curves)
GPS test – Garmin Edge 500 (Curves)
GPS test – Garmin Edge 500 (Loop)
GPS test – Garmin Edge 500 (Loop)

Phone Features & Call Quality

The Google Contacts and Phone handle telephony and offer the same user experience as on other Android smartphones. Call quality is good, and the microphone does a good job of suppressing background noise. The earpiece is loud enough for most situations, but the device is not loud enough to hear our call partner when calling in a loud environment.

Our test device does not support either VoLTE or VoWiFI.

Cameras

Photo taken with the front-facing camera
Photo taken with the front-facing camera

The K7 is equipped with dual 13 MP and 2 MP rear-facing cameras and a 5 MP front-facing sensor. Photos taken with the latter are unimpressive with fine details lacking focus and most images covered in a swathe of image noise. The camera app includes a set of filters that can smooth features, enlarge eyes and adjust image brightness among others.

The rear-facing camera can take panoramic photos, but colors look washed out and fine details are blurry. This blur notably worsens towards the edges of the panorama to the extent that only the center of the image looks sharp.

Colors in macro photos also look pale and much darker than the original colors. Again, objects in the center of the image are sharp, but objects look increasingly blurry towards the edges of the image. Low-light performance is worse, with objects looking underexposed and captured without fine details.

The default camera app has no manual mode and only has adjustable filters to alter the image before taking a shot.

Video recordings are also too pale and dark for our liking. The K7 lacks any image stabilization too, so objects blur easily. There are no customizable camera settings for video recordings either.

Image Comparison

Choose a scene and navigate within the first image. One click changes the position on touchscreens. One click on the zoomed-in image opens the original in a new window. The first image shows the scaled photograph of the test device.

Scene 1Scene 2Scene 3
click to load images
ColorChecker: The reference colour is displayed in the lower half of each area of colour
ColorChecker: The reference colour is displayed in the lower half of each area of colour

Testing the rear-facing camera with ColorChecker passport confirms that color reproduction is too dark and pale. Black and gray tones are much darker than the reference color too.

Our test device captures our test chart well under controlled lighting conditions, but fine details and structures are only sharp at the center of the image. The image becomes increasingly blurry towards the edge of the image as with all our other test photos.

Photo of our test chart
Photo of our test chart
Test chart in detail

Accessories & Warranty

The K7 comes with a USB charger, a USB Type-A to Micro USB cable, a SIM tool, a protective cover and a USB OTG adapter. OUKITEL does not offer any accessories specific to the K7 on its website.

The K7 comes with a twelve-month manufacturer’s warranty.

Input Devices & Operation

Google Gboard comes pre-installed with the K7 and works just as well as on any other Android smartphone. The device is set to vibrate on touch by default, but this could be turned off in Settings. The touchscreen responded accurately and quickly throughout testing, but the display surface has too much resistance for drag and drop movements. The positional sensor worked well throughout testing too.

The rear-mounted fingerprint sensor unlocks our test device quickly. You may struggle though, if you misplace your finger or it is dirty. 

Using Google Gboard in landscape mode
Using Google Gboard in landscape mode
Using Google Gboard in portrait mode
Using Google Gboard in portrait mode

Display

Sub-pixel array
Sub-pixel array

The K7 has a 6-inch IPS panel with a 2,160 x 1,080 native resolution and an 18:9 aspect ratio. X-Rite i1Pro 2 measures average maximum brightness at 456.1 cd/m², which is slightly lower than many of our comparison devices. Our test device has an 83% uniformly lit display, which again is lower than some of our comparison devices like the OUKITEL K10 and the Blackview P10000 Pro. This is still passable for daily use, but you may notice some difference in brightness across the display when looking at large blocks of color.

440
cd/m²
477
cd/m²
510
cd/m²
441
cd/m²
475
cd/m²
473
cd/m²
426
cd/m²
439
cd/m²
424
cd/m²
Distribution of brightness
X-Rite i1Pro 2
Maximum: 510 cd/m² Average: 456.1 cd/m² Minimum: 25.8 cd/m²
Brightness Distribution: 83 %
Center on Battery: 475 cd/m²
Contrast: 1979:1 (Black: 0.24 cd/m²)
ΔE Color 7.5 | 0.4-29.43 Ø6.2
ΔE Greyscale 7.7 | 0.64-98 Ø6.5
99.5% sRGB (Calman 2D)
Gamma: 2.26
Oukitel K7
IPS, 2160x1080, 6
Ulefone Power 5
IPS, 2160x1080, 6
Oukitel K10
IPS, 2160x1080, 6
Doogee BL9000
IPS, 2160x1080, 5.99
Blackview P10000 Pro
IPS, 2160x1080, 6
Screen
4%
-30%
-25%
-15%
Brightness middle
475
454
-4%
561
18%
529
11%
513
8%
Brightness
456
428
-6%
541
19%
513
13%
507
11%
Brightness Distribution
83
72
-13%
92
11%
82
-1%
89
7%
Black Level *
0.24
0.24
-0%
0.58
-142%
0.49
-104%
0.37
-54%
Contrast
1979
1892
-4%
967
-51%
1080
-45%
1386
-30%
Colorchecker DeltaE2000 *
7.5
6
20%
10
-33%
8.6
-15%
8.5
-13%
Colorchecker DeltaE2000 max. *
14.2
12.4
13%
16.7
-18%
16.8
-18%
15.2
-7%
Greyscale DeltaE2000 *
7.7
5.9
23%
11.1
-44%
10.9
-42%
10.6
-38%
Gamma
2.26 97%
2.22 99%
1.8 122%
2.37 93%
2.29 96%
CCT
8731 74%
7829 83%
9689 67%
9622 68%
10204 64%

* ... smaller is better

Screen Flickering / PWM (Pulse-Width Modulation)

To dim the screen, some notebooks will simply cycle the backlight on and off in rapid succession - a method called Pulse Width Modulation (PWM) . This cycling frequency should ideally be undetectable to the human eye. If said frequency is too low, users with sensitive eyes may experience strain or headaches or even notice the flickering altogether.
Screen flickering / PWM not detected

In comparison: 53 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 8933 (minimum: 43 - maximum: 142900) Hz was measured.

Our test device achieved a 0.24 cd/m² black value, which is on par with the best of our comparison devices. This relatively low black value helps our test device achieve a 1,979:1 contrast ratio; this is higher than all our comparison devices. This means that colors look sharp and black tones are deep, albeit with a slight gray tint to them. Unfortunately, the display has a noticeable blue tint.

CalMAN – Color accuracy
CalMAN – Color accuracy
CalMAN – Color space
CalMAN – Color space
CalMAN – Grayscale
CalMAN – Grayscale
CalMAN – Color saturation
CalMAN – Color saturation

Display Response Times

Display response times show how fast the screen is able to change from one color to the next. Slow response times can lead to afterimages and can cause moving objects to appear blurry (ghosting). Gamers of fast-paced 3D titles should pay special attention to fast response times.
       Response Time Black to White
26.4 ms ... rise ↗ and fall ↘ combined↗ 10 ms rise
↘ 16.4 ms fall
The screen shows relatively slow response rates in our tests and may be too slow for gamers.
In comparison, all tested devices range from 0.8 (minimum) to 240 (maximum) ms. » 52 % of all devices are better.
This means that the measured response time is similar to the average of all tested devices (25.6 ms).
       Response Time 50% Grey to 80% Grey
53.6 ms ... rise ↗ and fall ↘ combined↗ 28.4 ms rise
↘ 25.2 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.9 (minimum) to 636 (maximum) ms. » 89 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (41 ms).

The K7 is usable outdoors thanks to its relatively bright display and high contrast ratio but using our test device in sunny areas proved difficult. The display has a highly reflective finish, which catches the light in sunny weather and causes reflections that obscure content on the display. The display is still readable in moderate ambient light when looking directly at our test device.

Using the OUKITEL K7 outside
Using the OUKITEL K7 outside
Using the OUKITEL K7 outside
Using the OUKITEL K7 outside

The K7 has strong viewing angles thanks to its IPS display with no brightness or image distortion even at acute viewing angles.

Viewing angles
Viewing angles
Viewing angles
Viewing angles

Performance

The K7 is equipped with a MediaTek MT6750 SoC, which is powerful enough to keep the OS running smoothly. The MT6750 integrates an ARM Mali-T860 MP2 GPU, which is already two years old, 4 GB RAM and 64 GB of eMMC flash storage.

Our test device performs below average in CPU benchmarks and it scores around 25% lower than our comparison devices. The K7 only manages to finish ahead of the average of MT6750 powered devices that we have currently tested.

AnTuTu v6 - Total Score (sort by value)
Oukitel K7
43320 Points ∼57%
Ulefone Power 5
62774 Points ∼82% +45%
Oukitel K10
54763 Points ∼72% +26%
Doogee BL9000
62724 Points ∼82% +45%
Blackview P10000 Pro
59656 Points ∼78% +38%
Average Mediatek MT6750 (38547 - 44842, n=16)
41907 Points ∼55% -3%
Average of class Smartphone (23275 - 254229, n=390)
76481 Points ∼100% +77%
AnTuTu v7 - Total Score (sort by value)
Oukitel K7
52278 Points ∼44%
Ulefone Power 5
82639 Points ∼70% +58%
Oukitel K10
54519 Points ∼46% +4%
Doogee BL9000
81852 Points ∼69% +57%
Blackview P10000 Pro
73697 Points ∼62% +41%
Average Mediatek MT6750 (52278 - 56639, n=11)
44664 Points ∼38% -15%
Average of class Smartphone (17073 - 348178, n=170)
118332 Points ∼100% +126%
BaseMark OS II
Web (sort by value)
Oukitel K7
10 Points ∼1%
Ulefone Power 5
791 Points ∼100% +7810%
Oukitel K10
700 Points ∼88% +6900%
Doogee BL9000
785 Points ∼99% +7750%
Blackview P10000 Pro
771 Points ∼97% +7610%
Average Mediatek MT6750 (9 - 1137, n=18)
432 Points ∼55% +4220%
Average of class Smartphone (7 - 1731, n=499)
698 Points ∼88% +6880%
Graphics (sort by value)
Oukitel K7
471 Points ∼27%
Ulefone Power 5
867 Points ∼50% +84%
Oukitel K10
855 Points ∼49% +82%
Doogee BL9000
872 Points ∼50% +85%
Blackview P10000 Pro
931 Points ∼54% +98%
Average Mediatek MT6750 (471 - 649, n=18)
590 Points ∼34% +25%
Average of class Smartphone (18 - 15969, n=499)
1737 Points ∼100% +269%
Memory (sort by value)
Oukitel K7
967 Points ∼60%
Ulefone Power 5
1128 Points ∼70% +17%
Oukitel K10
1609 Points ∼100% +66%
Doogee BL9000
1257 Points ∼78% +30%
Blackview P10000 Pro
1596 Points ∼99% +65%
Average Mediatek MT6750 (609 - 1288, n=18)
835 Points ∼52% -14%
Average of class Smartphone (21 - 6283, n=499)
1244 Points ∼77% +29%
System (sort by value)
Oukitel K7
1786 Points ∼55%
Ulefone Power 5
2690 Points ∼83% +51%
Oukitel K10
2913 Points ∼90% +63%
Doogee BL9000
2543 Points ∼79% +42%
Blackview P10000 Pro
3229 Points ∼100% +81%
Average Mediatek MT6750 (1077 - 2003, n=18)
1770 Points ∼55% -1%
Average of class Smartphone (369 - 12202, n=499)
2512 Points ∼78% +41%
Overall (sort by value)
Oukitel K7
298 Points ∼22%
Ulefone Power 5
1201 Points ∼88% +303%
Oukitel K10
1294 Points ∼94% +334%
Doogee BL9000
1216 Points ∼89% +308%
Blackview P10000 Pro
1370 Points ∼100% +360%
Average Mediatek MT6750 (253 - 965, n=18)
653 Points ∼48% +119%
Average of class Smartphone (150 - 6097, n=503)
1255 Points ∼92% +321%
Geekbench 4.1/4.2
Compute RenderScript Score (sort by value)
Oukitel K7
1924 Points ∼43%
Doogee BL9000
2909 Points ∼64% +51%
Average Mediatek MT6750 (1393 - 1935, n=15)
1707 Points ∼38% -11%
Average of class Smartphone (836 - 21070, n=197)
4524 Points ∼100% +135%
64 Bit Multi-Core Score (sort by value)
Oukitel K7
2566 Points ∼60%
Ulefone Power 5
3650 Points ∼85% +42%
Doogee BL9000
3678 Points ∼85% +43%
Average Mediatek MT6750 (1790 - 2765, n=17)
2511 Points ∼58% -2%
Average of class Smartphone (883 - 11598, n=247)
4308 Points ∼100% +68%
64 Bit Single-Core Score (sort by value)
Oukitel K7
664 Points ∼52%
Ulefone Power 5
787 Points ∼62% +19%
Doogee BL9000
791 Points ∼62% +19%
Average Mediatek MT6750 (590 - 682, n=17)
616 Points ∼49% -7%
Average of class Smartphone (394 - 4824, n=248)
1270 Points ∼100% +91%
3DMark
2560x1440 Sling Shot Extreme (ES 3.1) Physics (sort by value)
Oukitel K7
1113 Points ∼68%
Ulefone Power 5
1549 Points ∼94% +39%
Oukitel K10
1257 Points ∼77% +13%
Doogee BL9000
1572 Points ∼96% +41%
Blackview P10000 Pro
1469 Points ∼89% +32%
Average Mediatek MT6750 (702 - 1233, n=18)
1082 Points ∼66% -3%
Average of class Smartphone (2281 - 4216, n=352)
1642 Points ∼100% +48%
2560x1440 Sling Shot Extreme (ES 3.1) Graphics (sort by value)
Oukitel K7
90 Points ∼8%
Ulefone Power 5
396 Points ∼33% +340%
Oukitel K10
56 Points ∼5% -38%
Doogee BL9000
370 Points ∼31% +311%
Blackview P10000 Pro
53 Points ∼4% -41%
Average Mediatek MT6750 (90 - 329, n=18)
283 Points ∼24% +214%
Average of class Smartphone (815 - 5241, n=352)
1186 Points ∼100% +1218%
2560x1440 Sling Shot Extreme (ES 3.1) (sort by value)
Oukitel K7
113 Points ∼10%
Ulefone Power 5
444 Points ∼39% +293%
Oukitel K10
71 Points ∼6% -37%
Doogee BL9000
446 Points ∼39% +295%
Blackview P10000 Pro
68 Points ∼6% -40%
Average Mediatek MT6750 (113 - 393, n=18)
336 Points ∼30% +197%
Average of class Smartphone (951 - 4734, n=360)
1134 Points ∼100% +904%
2560x1440 Sling Shot OpenGL ES 3.0 Physics (sort by value)
Oukitel K7
1054 Points ∼68%
Ulefone Power 5
1551 Points ∼100% +47%
Oukitel K10
1200 Points ∼77% +14%
Doogee BL9000
1546 Points ∼100% +47%
Blackview P10000 Pro
1456 Points ∼94% +38%
Average Mediatek MT6750 (694 - 1219, n=18)
1059 Points ∼68% 0%
Average of class Smartphone (532 - 4215, n=384)
1540 Points ∼99% +46%
2560x1440 Sling Shot OpenGL ES 3.0 Graphics (sort by value)
Oukitel K7
109 Points ∼7%
Ulefone Power 5
582 Points ∼36% +434%
Oukitel K10
55 Points ∼3% -50%
Doogee BL9000
578 Points ∼35% +430%
Blackview P10000 Pro
55 Points ∼3% -50%
Average Mediatek MT6750 (109 - 484, n=18)
411 Points ∼25% +277%
Average of class Smartphone (46 - 8312, n=384)
1632 Points ∼100% +1397%
2560x1440 Sling Shot OpenGL ES 3.0 (sort by value)
Oukitel K7
136 Points ∼10%
Ulefone Power 5
676 Points ∼49% +397%
Oukitel K10
70 Points ∼5% -49%
Doogee BL9000
671 Points ∼48% +393%
Blackview P10000 Pro
71 Points ∼5% -48%
Average Mediatek MT6750 (136 - 559, n=18)
471 Points ∼34% +246%
Average of class Smartphone (58 - 6454, n=392)
1387 Points ∼100% +920%
1280x720 offscreen Ice Storm Unlimited Physics (sort by value)
Oukitel K7
Points ∼0%
Ulefone Power 5
10689 Points ∼83%
Oukitel K10
6847 Points ∼53%
Doogee BL9000
9782 Points ∼76%
Blackview P10000 Pro
7733 Points ∼60%
Average Mediatek MT6750 (7716 - 10553, n=18)
8773 Points ∼68%
Average of class Smartphone (3958 - 37475, n=539)
12880 Points ∼100%
1280x720 offscreen Ice Storm Unlimited Graphics Score (sort by value)
Oukitel K7
Points ∼0%
Ulefone Power 5
11269 Points ∼63%
Oukitel K10
9862 Points ∼55%
Doogee BL9000
11204 Points ∼62%
Blackview P10000 Pro
10997 Points ∼61%
Average Mediatek MT6750 (9476 - 10361, n=18)
8680 Points ∼48%
Average of class Smartphone (2465 - 162695, n=539)
17994 Points ∼100%
1280x720 offscreen Ice Storm Unlimited Score (sort by value)
Oukitel K7
Points ∼0%
Ulefone Power 5
11148 Points ∼74%
Oukitel K10
8983 Points ∼59%
Doogee BL9000
10853 Points ∼72%
Blackview P10000 Pro
10054 Points ∼67%
Average Mediatek MT6750 (9210 - 10269, n=18)
8706 Points ∼58%
Average of class Smartphone (2915 - 77599, n=540)
15114 Points ∼100%
GFXBench (DX / GLBenchmark) 2.7
1920x1080 T-Rex HD Offscreen C24Z16 (sort by value)
Oukitel K7
12 fps ∼38%
Ulefone Power 5
22 fps ∼70% +83%
Oukitel K10
22 fps ∼70% +83%
Doogee BL9000
22 fps ∼70% +83%
Blackview P10000 Pro
21 fps ∼67% +75%
Average Mediatek MT6750 (12 - 17, n=15)
15.2 fps ∼48% +27%
Average of class Smartphone (4.1 - 251, n=564)
31.4 fps ∼100% +162%
T-Rex HD Onscreen C24Z16 (sort by value)
Oukitel K7
12 fps ∼48%
Ulefone Power 5
21 fps ∼84% +75%
Oukitel K10
21 fps ∼84% +75%
Doogee BL9000
21 fps ∼84% +75%
Blackview P10000 Pro
20 fps ∼80% +67%
Average Mediatek MT6750 (12 - 25, n=15)
20.5 fps ∼82% +71%
Average of class Smartphone (6.9 - 120, n=567)
25 fps ∼100% +108%
GFXBench 3.0
off screen Manhattan Offscreen OGL (sort by value)
Oukitel K7
5.9 fps ∼35%
Ulefone Power 5
10 fps ∼60% +69%
Oukitel K10
10 fps ∼60% +69%
Doogee BL9000
10 fps ∼60% +69%
Blackview P10000 Pro
11 fps ∼65% +86%
Average Mediatek MT6750 (5.3 - 7.1, n=16)
6.31 fps ∼38% +7%
Average of class Smartphone (2.2 - 132, n=486)
16.8 fps ∼100% +185%
on screen Manhattan Onscreen OGL (sort by value)
Oukitel K7
5.6 fps ∼35%
Ulefone Power 5
10 fps ∼63% +79%
Oukitel K10
10 fps ∼63% +79%
Doogee BL9000
10 fps ∼63% +79%
Blackview P10000 Pro
10 fps ∼63% +79%
Average Mediatek MT6750 (5.6 - 13, n=16)
9.94 fps ∼62% +78%
Average of class Smartphone (4.1 - 115, n=489)
16 fps ∼100% +186%
GFXBench 3.1
off screen Manhattan ES 3.1 Offscreen (sort by value)
Oukitel K7
4.2 fps ∼29%
Ulefone Power 5
6.6 fps ∼46% +57%
Oukitel K10
6.5 fps ∼45% +55%
Doogee BL9000
6.6 fps ∼46% +57%
Blackview P10000 Pro
6.9 fps ∼48% +64%
Average Mediatek MT6750 (3.5 - 4.7, n=16)
4.22 fps ∼30% 0%
Average of class Smartphone (10 - 88, n=349)
14.3 fps ∼100% +240%
on screen Manhattan ES 3.1 Onscreen (sort by value)
Oukitel K7
3.8 fps ∼27%
Ulefone Power 5
6.3 fps ∼45% +66%
Oukitel K10
6.2 fps ∼45% +63%
Doogee BL9000
6.3 fps ∼45% +66%
Blackview P10000 Pro
7.1 fps ∼51% +87%
Average Mediatek MT6750 (3.8 - 10, n=16)
7.39 fps ∼53% +94%
Average of class Smartphone (9.8 - 110, n=352)
13.9 fps ∼100% +266%
GFXBench
off screen Car Chase Offscreen (sort by value)
Oukitel K7
2.5 fps ∼25%
Ulefone Power 5
3.5 fps ∼35% +40%
Oukitel K10
3.7 fps ∼38% +48%
Doogee BL9000
3.8 fps ∼39% +52%
Blackview P10000 Pro
4 fps ∼41% +60%
Average Mediatek MT6750 (1.9 - 2.5, n=17)
2.26 fps ∼23% -10%
Average of class Smartphone (6.3 - 54, n=280)
9.86 fps ∼100% +294%
on screen Car Chase Onscreen (sort by value)
Oukitel K7
2.4 fps ∼27%
Ulefone Power 5
3.9 fps ∼44% +63%
Oukitel K10
3.6 fps ∼40% +50%
Doogee BL9000
3.8 fps ∼43% +58%
Blackview P10000 Pro
4.1 fps ∼46% +71%
Average Mediatek MT6750 (2.3 - 4.9, n=17)
3.52 fps ∼40% +47%
Average of class Smartphone (6 - 58, n=283)
8.89 fps ∼100% +270%

Legend

 
Oukitel K7 Mediatek MT6750, ARM Mali-T860 MP2, 64 GB eMMC Flash
 
Ulefone Power 5 Mediatek Helio P23 MT6763T, ARM Mali-G71 MP2, 64 GB eMMC Flash
 
Oukitel K10 Mediatek Helio P23 MT6763T, ARM Mali-G71 MP2, 64 GB eMMC Flash
 
Doogee BL9000 Mediatek Helio P23 MT6763T, ARM Mali-G71 MP2, 64 GB eMMC Flash
 
Blackview P10000 Pro Mediatek Helio P23 MT6763T, ARM Mali-G71 MP2, 64 GB eMMC Flash

The K7 finishes near the bottom of browser benchmarks too, but web browsing feels smooth in daily use. Media content will take slightly longer to load than the rest of the page though.

JetStream 1.1 - 1.1 Total Score
Average of class Smartphone (10.8 - 273, n=422)
36.7 Points ∼100% +101%
Ulefone Power 5 (Chrome 65)
22.811 Points ∼62% +25%
Doogee BL9000 (Chrome 67)
21.832 Points ∼59% +20%
Oukitel K10 (Standard Browser 7.1.1)
19.84 Points ∼54% +9%
Average Mediatek MT6750 (12.7 - 20.8, n=18)
18.5 Points ∼50% +1%
Oukitel K7 (Chrome 67)
18.23 Points ∼50%
Blackview P10000 Pro (Chrome 66)
17.876 Points ∼49% -2%
Octane V2 - Total Score
Average of class Smartphone (1506 - 43280, n=558)
5562 Points ∼100% +63%
Ulefone Power 5 (Chrome 65)
4233 Points ∼76% +24%
Doogee BL9000 (Chrome 67)
4161 Points ∼75% +22%
Blackview P10000 Pro (Chrome 66)
3443 Points ∼62% +1%
Oukitel K7 (Chrome 67)
3403 Points ∼61%
Average Mediatek MT6750 (2468 - 3506, n=18)
3157 Points ∼57% -7%
Oukitel K10 (Standard Browser 7.1.1)
3051 Points ∼55% -10%
Mozilla Kraken 1.1 - Total Score
Oukitel K10 (Standard Browser 7.1.1)
22892.5 ms * ∼100% -64%
Average Mediatek MT6750 (11708 - 22627, n=18)
14242 ms * ∼62% -2%
Oukitel K7 (Chrome 67)
13931.4 ms * ∼61%
Ulefone Power 5 (Chrome 65)
12965.7 ms * ∼57% +7%
Doogee BL9000 (Chrome 67)
12915.1 ms * ∼56% +7%
Blackview P10000 Pro (Chrome 66)
12786.8 ms * ∼56% +8%
Average of class Smartphone (603 - 59466, n=578)
11474 ms * ∼50% +18%

* ... smaller is better

Our test devices performed comparatively poorly in storage benchmarks too. Internal storage speeds are slightly above average, but they are still somewhat worse than our comparison devices.

This is the same for microSD card performance, which we tested using our Toshiba Exceria Pro M501 reference microSD card. Our test device had around 30% slower sequential write speeds than our comparison devices and 11% slower sequential read speeds.

Oukitel K7Ulefone Power 5Oukitel K10Doogee BL9000Blackview P10000 ProAverage 64 GB eMMC FlashAverage of class Smartphone
AndroBench 3-5
42%
51%
36%
11%
29%
-3%
Sequential Write 256KB SDCard
56.37 (Toshiba Exceria Pro M401)
73.58 (Toshiba Exceria Pro M501)
31%
74.66 (Toshiba Exceria Pro M501)
32%
73.04 (Toshiba Exceria Pro M501)
30%
73.33 (Toshiba Exceria Pro M501)
30%
54.3 (14.1 - 74.7, n=68)
-4%
45.6 (3.4 - 87.1, n=319)
-19%
Sequential Read 256KB SDCard
72.64 (Toshiba Exceria Pro M401)
80.28 (Toshiba Exceria Pro M501)
11%
82.23 (Toshiba Exceria Pro M501)
13%
80.27 (Toshiba Exceria Pro M501)
11%
80.93 (Toshiba Exceria Pro M501)
11%
73.2 (21.1 - 86.9, n=68)
1%
63.8 (8.2 - 96.5, n=319)
-12%
Random Write 4KB
13.03
13.78
6%
22.88
76%
13.19
1%
14.6
12%
19.8 (3.4 - 87.1, n=78)
52%
16.1 (0.14 - 164, n=607)
24%
Random Read 4KB
27.78
63.15
127%
52.15
88%
49.78
79%
29.98
8%
50.3 (11.4 - 149, n=78)
81%
38.3 (1.59 - 173, n=607)
38%
Sequential Write 256KB
110.35
195.7
77%
213.25
93%
210.74
91%
112.3
2%
164 (40 - 246, n=78)
49%
79.9 (2.99 - 246, n=607)
-28%
Sequential Read 256KB
280.32
281.2
0%
291.53
4%
289.04
3%
284.33
1%
269 (115 - 704, n=78)
-4%
230 (12.1 - 895, n=607)
-18%

Games

The ARM Mali-T860 MP2 is suitable for casual games with low system requirements. Games like Dead Trigger 2 and Arena of Valor run smoothly, but the K7 will struggle with games that are more complex unless you play them at low graphics settings. Even then, expect long load times.

The position sensor worked well throughout testing, but the highly resistive display finish makes playing games uncomfortable and a chore.

Dead Trigger 2
Dead Trigger 2
Arena of Valor
Arena of Valor

Emissions

Temperature

Surface temperatures always remain at just above 30 °C (86 °F) but they can reach 38 °C (100.4 °F) under load. Our test device remains relatively cool under load and does not feel hot. However, the K7 will not feel cool to the touch in daily use when the device is just idling. On the plus side, the K7 should not thermal throttle either.

Max. Load
 36.7 °C
98 F
35.7 °C
96 F
37.6 °C
100 F
 
 37.8 °C
100 F
36 °C
97 F
38.4 °C
101 F
 
 37.9 °C
100 F
35.7 °C
96 F
35.6 °C
96 F
 
Maximum: 38.4 °C = 101 F
Average: 36.8 °C = 98 F
30.7 °C
87 F
35.7 °C
96 F
36.3 °C
97 F
31.7 °C
89 F
34.8 °C
95 F
36.8 °C
98 F
31.3 °C
88 F
34.4 °C
94 F
35.3 °C
96 F
Maximum: 36.8 °C = 98 F
Average: 34.1 °C = 93 F
Power Supply (max.)  29.7 °C = 85 F | Room Temperature 20.8 °C = 69 F | Voltcraft IR-260
(±) The average temperature for the upper side under maximal load is 36.8 °C / 98 F, compared to the average of 33.2 °C / 92 F for the devices in the class Smartphone.
(+) The maximum temperature on the upper side is 38.4 °C / 101 F, compared to the average of 35.7 °C / 96 F, ranging from 22.4 to 51.7 °C for the class Smartphone.
(+) The bottom heats up to a maximum of 36.8 °C / 98 F, compared to the average of 34.2 °C / 94 F
(±) In idle usage, the average temperature for the upper side is 32.7 °C / 91 F, compared to the device average of 33.2 °C / 92 F.
Heatmap of the front of the device under load
Heatmap of the front of the device under load
Heatmap of the rear of the device under load
Heatmap of the rear of the device under load

Speakers

Speaker characteristics
Speaker characteristics

The K7 has a surprisingly good mono-speaker. The sound quality is clear and rich with good mid tones and even passable low-end tones. The speaker in our test device reaches a maximum of 84.7 dB(A), which should be loud enough in most situations. Overall, the speaker is good enough for music playback, which is a rarity for a €190 (~$216) device.

The K7 has a 3.5 mm jack, but unfortunately, external speaker and headphone jacks do not firmly click into place. This means that headphones can easily become unplugged, which may quickly become frustrating in daily use.

dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2033.933.32528.437.93136.1314030.928.35030.630.16322.225.18024.921.510024.423.312523.522.116020.328.720019.835.425018.239.931517.44940016.656.450017.157.263015.962.380015.966.5100015.967.5125016.77216001673.4200015.968.9250016.273.7315016.474.940001777.4500016.576.8630016.471.4800016.663.4100001757.71250016.561.21600016.962.6SPL28.684.7N1.155.1median 16.6median 62.6Delta1.613.435.24532.946.337.241.531.739.339.64328.334.127.328.526.933.326.728.72429.420.928.720.934.119.54518.554.117.564.617.567.315.769.215.868.616.668.115.86815.47015.5701673.215.877.11669.716.364.516.357.516.253.816.44816.444.528.682.51.148.8median 16.4median 64.52.112.6hearing rangehide median Pink NoiseOukitel K7Doogee BL9000
Frequency diagram (checkboxes can be checked and unchecked to compare devices)
Oukitel K7 audio analysis

(+) | speakers can play relatively loud (84.7 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 29.5% lower than median
(±) | linearity of bass is average (10.9% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | higher mids - on average 5.9% higher than median
(±) | linearity of mids is average (7.9% delta to prev. frequency)
Highs 2 - 16 kHz
(±) | higher highs - on average 9.6% higher than median
(±) | linearity of highs is average (8.7% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (27.7% difference to median)
Compared to same class
» 68% of all tested devices in this class were better, 10% similar, 22% worse
» The best had a delta of 13%, average was 25%, worst was 44%
Compared to all devices tested
» 81% of all tested devices were better, 5% similar, 14% worse
» The best had a delta of 3%, average was 21%, worst was 53%

Doogee BL9000 audio analysis

(+) | speakers can play relatively loud (82.5 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 31.3% lower than median
(±) | linearity of bass is average (9.5% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 4.3% away from median
(±) | linearity of mids is average (7.1% delta to prev. frequency)
Highs 2 - 16 kHz
(±) | higher highs - on average 7.1% higher than median
(±) | linearity of highs is average (9% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (27.9% difference to median)
Compared to same class
» 70% of all tested devices in this class were better, 10% similar, 21% worse
» The best had a delta of 13%, average was 25%, worst was 44%
Compared to all devices tested
» 82% of all tested devices were better, 5% similar, 13% worse
» The best had a delta of 3%, average was 21%, worst was 53%

Battery Life

Power Consumption

The K7 has higher power consumption than all our comparison devices but is 10% more efficient than the average of MT6750 powered devices that we have currently tested. Our test device consumes a minimum of 1.01 W at idle, which is considerably more than both the Doogee BL9000 and the Blackview P10000 Pro. This increases to an average of 4.1 W and a maximum of 7.2 W under load, both of which are significantly higher than all our comparison devices.

The included charger is rated at 18 W, so it will be able to charge the K7 even when it is running at full load.

Power Consumption
Off / Standbydarklight 0.02 / 0.18 Watt
Idledarkmidlight 1.01 / 1.99 / 2.09 Watt
Load midlight 4.1 / 7.2 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy
Oukitel K7
10000 mAh
Ulefone Power 5
13000 mAh
Oukitel K10
11000 mAh
Doogee BL9000
9000 mAh
Blackview P10000 Pro
11000 mAh
Average Mediatek MT6750
 
Average of class Smartphone
 
Power Consumption
10%
5%
29%
10%
-10%
10%
Idle Minimum *
1.01
1.07
-6%
0.89
12%
0.68
33%
0.63
38%
1.154 (0.57 - 2.3, n=18)
-14%
0.88 (0.2 - 3.4, n=637)
13%
Idle Average *
1.99
2.06
-4%
2.48
-25%
1.65
17%
2.2
-11%
2.05 (1.42 - 3.5, n=18)
-3%
1.719 (0.6 - 6.2, n=636)
14%
Idle Maximum *
2.09
2.09
-0%
2.52
-21%
1.71
18%
2.3
-10%
2.46 (1.47 - 5.9, n=18)
-18%
1.997 (0.74 - 6.6, n=637)
4%
Load Average *
4.1
2.9
29%
3.13
24%
2.78
32%
3.57
13%
5.19 (3.24 - 10.8, n=18)
-27%
4.04 (0.8 - 10.8, n=631)
1%
Load Maximum *
7.2
4.88
32%
4.5
37%
3.99
45%
5.82
19%
6.5 (3.3 - 12.4, n=18)
10%
5.75 (1.2 - 14.2, n=631)
20%

* ... smaller is better

Battery Life

We tested battery runtimes with our Wi-Fi battery life test, during which we run a script that simulates the load required to render websites. The K7’s 10,000 mAh battery lasts twenty-one hours and thirty-four minutes in this test, which is substantially longer than many other smartphones. However, the K7’s comparatively high power consumption is its downfall in terms of battery life, with all our comparison devices lasting considerably longer in our Wi-Fi battery life test. By contrast, the Blackview P10000 Pro has a 1,000 mAh larger battery than the K7 but lasts an additional fourteen hours.

The included 18 W charger takes about five hours to fully recharge the K7.

Battery Runtime
NBC WiFi Websurfing Battery Test 1.3
21h 34min
Oukitel K7
10000 mAh
Ulefone Power 5
13000 mAh
Oukitel K10
11000 mAh
Doogee BL9000
9000 mAh
Blackview P10000 Pro
11000 mAh
Battery Runtime
WiFi v1.3
1294
2636
104%
1632
26%
2283
76%
2149
66%

Pros

+ contrast-rich display
+ long battery life
+ robust case

Cons

- poor system performance
- high power consumption
- thick and heavy

Verdict

The OUKITEL K7 in review. Test device courtesy of OUKITEL.
The OUKITEL K7 in review. Test device courtesy of OUKITEL.

The OUKITEL K7 is powerful enough to run Android 8.1 and most apps smoothly. The device also has a good display and extremely long battery life. The K7 has some downsides though including its comparatively high power consumption, which impacts battery life, and its relatively poor system performance.

The OUKITEL K7 has a monster battery, but the device comes with some downsides.

The K7 is a heavy device with low-quality cameras and high power consumption. However, for €190 (~$216) buyers will receive a device that has long battery life and one which can run most apps without issue.

Oukitel K7 - 08/12/2018 v6
Mike Wobker

Chassis
80%
Keyboard
65 / 75 → 87%
Pointing Device
72%
Connectivity
40 / 60 → 67%
Weight
86%
Battery
100%
Display
83%
Games Performance
13 / 63 → 20%
Application Performance
24 / 70 → 34%
Temperature
89%
Noise
100%
Audio
70 / 91 → 77%
Camera
61%
Average
68%
76%
Smartphone - Weighted Average

Pricecompare

static version load dynamic
Loading Comments
Comment on this article
Please share our article, every link counts!
> Notebook / Laptop Reviews and News > Reviews > OUKITEL K7 Smartphone Review
Mike Wobker, 2018-08-13 (Update: 2018-08-16)