Notebookcheck

Oukitel K4000 Pro Smartphone Review

Marcus Herbrich (translated by Liala Stieglitz), 04/05/2016

Resistant? Oukitel advertises it K4000 smartphone lineup as particularly resistant. The manufacturer claims that it will even cope with blows from a hammer or can be used for hitting a nail in wood. Our report reveals whether the quality of the screen in Oukitel's K4000 Pro is also impressive.

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For the original German review, see here.

The Chinese manufacturer Oukitel advertises its K4000 Pro smartphone as a particularly robust and long-lasting smartphone. The 4600 mAh battery, which is very generously sized for a 5-inch smartphone, is to ensure the latter. The manufacturer also states that the 1.1 millimeter (~0.04 in) screen is approximately 60% stronger than the panels of "normal" smartphones, which is especially protected if dropped.

The price of around 120 Euros (~$136) for the dual-SIM capable K4000 Pro is comparatively low. Since Oukitel does not sell its devices directly on the German market, the smartphone can only be purchased via import companies. The handset is available in black or white.

Most rivals in this price range are Android based: LG Spirit and Motorola Moto E 2015 (2nd generation). However, the latest Lumia 550 entry-level handset by Microsoft is a potential alternative.

Oukitel K4000 Pro
Processor
Mediatek MT6735 1.5 GHz
Memory
2048 MB 
Display
5 inch 16:9, 1280x720 pixel 294 PPI, capacitive, multi-touch, IPS, glossy: yes
Storage
16 GB eMMC Flash, 16 GB 
, 12.27 GB free
Connections
1 USB 2.0, Audio Connections: 3.5 mm jack, Card Reader: micro-SD (max. 64 GB), Brightness Sensor, Sensors: proximity sensor, accelerometer, OTG, Fast Charging
Networking
802.11a/b/g/n (a/b/g/n), Bluetooth 4.0, GSM (850/900/1800/1900), UMTS (900/2100), LTE (800/900/1800/2100/2600), Dual SIM, LTE, GPS
Size
height x width x depth (in mm): 12.5 x 145.6 x 72 ( = 0.49 x 5.73 x 2.83 in)
Battery
17.48 Wh, 4600 mAh Lithium-Polymer, removeable, 3.8 V, Talk time 2G (according to manufacturer): 20 h, Talk time 3G (according to manufacturer): 20 h, Standby 2G (according to manufacturer): 500 h, Standby 3G (according to manufacturer): 500 h
Operating System
Android 5.1 Lollipop
Camera
Primary Camera: 8 MPix 13 MP interpolation, aperture f/2.0
Secondary Camera: 2 MPix 5 MP interpolation, aperture f/2.8
Additional features
Speakers: mono, Keyboard: on-screen, USB charger, power supply, cover, screen protector, 12 Months Warranty, SAR 0.572 W/kg (head); SAR 0.402 W/kg (body), fanless
Weight
250 g ( = 8.82 oz / 0.55 pounds), Power Supply: 57 g ( = 2.01 oz / 0.13 pounds)
Price
120 Euro

 

Case

The 5-inch smartphone's weight and height are downright surprising when taking the handset out of its box for the first time. Oukitel's K4000 Pro is very heavy and bulky at 250 grams (~8.8 oz) and 12.5 millimeters (~0.5 in) respectively. The solid, angular metal bezel on the handset's sides does not contribute to a better feel. The build of the volume and power buttons is not compelling; the plastic buttons clatter and wobble. On the other hand, the pressure points are good for this device category.

The surface of the removable plastic back features a leather-like design that is familiar from Samsung Galaxy Note 3. The centered 8 megapixel primary camera juts out noticeably from the casing. The 16 GB internal storage can be expanded via a micro-SD card and the battery with a nominal output of 4600 mAh can be replaced after removing the back cover.

The front of Oukitel's K4000 Pro is made of scratch-resistant glass that is integrated into the casing's lightly curved, 2.5D bezel. The edges around the 720x1280 pixel screen (294 PPI) are relatively wide. The dimensions of 145.6 x 72 millimeters (~5.7 x 2.8 in) and a screen diagonal of 5 inches result in a screen-surface ratio of just 65.7%.

The casing's stability is very good. However, the back of our review sample is quite easy to dent with little pressure, which sometimes produces creaking noises.

Connectivity

The internal eMMC storage of 16 GB is generous for this price range, and it can be expanded via a micro-SD card when required. After deducting the operating system, the user has 12.93 GB (ROM) for personal usage. Mediatek's 64-bit quad-core CPU in Oukitel's K4000 Pro can also utilize 2 GB of working memory (RAM), which is not a matter of course in the entry-level smartphone sector.

In addition to recharging, the micro-USB port on the handset's lower edge can also be connected to external keyboards or flash drives via an OTG adapter. The smartphone also features an FM radio and "Fast Charging". Moving compatible apps to the SD card (App2SD) functioned without problems.

Software

Android 5.1 Lollipop is the operating system preloaded on our review sample. However, the manufacturer has announced an upgrade to Android 6.0 (Marshmallow) for late April to early May. According to Oukitel, new devices are to be delivered with Android 6.0 ex-factory. The user interfaces stick closely to Google's standard Android. In contrast, the app design looks relatively cramped and colorful. Oukitel does not use an app drawer in the K4000 Pro and thus all installed apps are distributed over the home screen.

In line with the configuration, there are plenty of software features for customizing the handset in view of the price range. For example, it is possible to open applications via predetermined gestures or movements or to move photos without touching the handset - as already familiar from Samsung devices.

GPS Test indoors
GPS Test outdoors

Communication & GPS

Oukitel incorporates dual-SIM functionality in the K4000 Pro. This enables using two micro-SIM cards without having to forgo expanding the storage via micro-SD card. The smartphone connects to the Internet via LTE Cat. 4, which theoretically allows a maximum speed of 150 MBit/s (download) and 50 MBit/s (upload). Beyond that, it supports all frequency bands relevant in Germany. This is also true for the 2G and 3G mobile networks.

Oukitel's K4000 Pro connects to Wi-Fi using the 802.11 b/g/n standards. Its reception performance ensured a decent and consistently stable signal. Bluetooth version 4.0 is installed for communicating with other mobile devices. An NFC chip is not present.

The reception performance of the installed GPS module was bad. Clear differences between the smartphone and the Garmin Edge 500 reference GPS navigation system became evident on our roughly 11 kilometer (~6.8 mi) test route (>6 kilometers/3.7 mi). This major deviation is due to the fact that a part of the route was not recorded. Connecting to a satellite was not possible indoors. Localization was relatively good and fast outdoors. The accuracy is mediocre at 13 feet, approx. 4 meters.

GPS Oukitel K4000 Pro
GPS Oukitel K4000 pro
GPS Oukitel K4000 Pro
GPS Garmin Edge 500
GPS Garmin Edge 500
GPS Garmin Edge 500
Phone app
Front-facing camera

Telephone & Call Quality

The phone app corresponds largely to Google's standard application. The earpiece's sound and voice quality are satisfactory. Their maximum volume also ensures good intelligibility of the contact. Our contact also perceived the microphone in test calls and video calls via Skype as clear.

Cameras & Multimedia

The primary camera on the rear of Oukitel's K4000 Pro has an aperture of f/2.0 and a resolution of 8 megapixels. However, photos are interpolated to 13 megapixels. It looks similar to pictures shot using the 2 megapixel front-facing camera, which are interpolated to 5 megapixels.

The quality of the 8 megapixels is acceptable for a device in this price range even though the photos suffer from blurriness (scene photo) and especially image noise (ambient/room photo). The autofocus is also rather inaccurate - reproduced details are very rough. The rear-sided LED flash is quite suitable for using the preloaded flashlight app. The added value for photos in low-light conditions is rather low. The K4000 Pro records videos in 1080p at 30 FPS.

The interpolated photos taken with the front-facing camera are roughly on par with the rivals from this price range in terms of color reproduction and image sharpness - and average if at all. However, it is still quite useful for video conferencing.

Test card
Test card section (center)
Screenshot of ColorChecker colors. Original colors are displayed in the lower half of each patch.

Image Comparison

Choose a scene and navigate within the first image. One click changes the zoom step. 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

Accessories

As well as the handset, a quick start guide, modular power supply and a USB charging cable are in the box. Moreover, Oukitel adds a transparent plastic cover plus a screen protector for the display. The latter is already fitted ex-factory.

Warranty

Oukitel includes a 12-month warranty period on its smartphones.

Input Devices & Handling

The touchscreen is accurate up into the corners and multi-touch gestures are detected reliably. The K4000 Pro does not have any on-screen buttons; three capacitive, non-illuminated buttons below the screen are used for control. Oukitel preloads Google's standard Android keyboard for on-screen inputting. Oukitel's K4000 Pro also supports gesture control. For example, the smartphone can be muted by turning it around on its screen, and tapping the disabled screen twice wakes it up from standby mode. Both functioned very well in the test.

On-screen keyboard portrait mode
On-screen keyboard landscape mode

Display

Subpixel grid

The 5-inch LC display has an agreeable resolution of 720x1280 pixels (294 PPI), and the content is displayed correspondingly sharp. The IPS panel's maximum brightness of 390 cd/m² is relatively low, but it proves sufficient in routine use. The practical APL 50 test achieves a brightness of 369 cd/m² in the screen's center, which is hardly different from the maximum rate. Content is still legible in direct sunlight. However, the brightness sensor should be disabled in this case because it reduces the maximum brightness to 297 cd/m². A reduction of the maximum brightness in auto mode is a unique test occurrence.

365
cd/m²
372
cd/m²
385
cd/m²
348
cd/m²
360
cd/m²
374
cd/m²
346
cd/m²
363
cd/m²
390
cd/m²
Distribution of brightness
X-Rite i1Pro 2
Maximum: 390 cd/m² Average: 367 cd/m² Minimum: 15.69 cd/m²
Brightness Distribution: 89 %
Center on Battery: 360 cd/m²
Contrast: 1000:1 (Black: 0.36 cd/m²)
ΔE Color 9.01 | - Ø
ΔE Greyscale 8.67 | - Ø
Gamma: 2.66
Oukitel K4000 Pro
, MT6735, 16 GB eMMC Flash
Microsoft Lumia 550
Adreno 304, 210 MSM8909, 8 GB eMMC Flash
Motorola Moto E 2. Gen 2015
Adreno 306, 410 MSM8916, 8 GB eMMC Flash
LG Spirit
Adreno 306, 410 MSM8916, 8 GB eMMC Flash
Samsung Galaxy S7
Mali-T880 MP12, 8890 Octa, 32 GB UFS 2.0 Flash
Screen
3%
20%
5%
41%
Brightness
367
535
46%
204
-44%
348
-5%
351
-4%
Brightness Distribution
89
95
7%
55
-38%
92
3%
98
10%
Black Level *
0.36
0.62
-72%
0.15
58%
0.46
-28%
Contrast
1000
865
-13%
1447
45%
780
-22%
Colorchecker DeltaE2000 *
9.01
5.81
36%
4.12
54%
5.17
43%
2.04
77%
Greyscale DeltaE2000 *
8.67
7.72
11%
4.87
44%
5.4
38%
1.63
81%
Gamma
2.66 90%
2.18 110%
2.38 101%
2.35 102%
2.07 116%
CCT
7641 85%
8701 75%
6019 108%
7168 91%
6391 102%
Color Space (Percent of AdobeRGB 1998)
86.86
Color Space (Percent of sRGB)
99.35

* ... smaller is better

The contrast and black level of Oukitel's K4000 Pro is outstanding, although the good rates are due to the screen's low brightness. The handset presents clear shortcomings in color reproduction. DeltaE deviation of 9.01 (color accuracy) and 8.67 (grayscale) are below-average even in this price range. The deviations to the sRGB reference color space are also quite high. The measurements with the Colorimeter (CalMAN software) resulted in a slightly cool color reproduction (7641 K). However, this is barely visible in everyday use.

CalMAN ColorChecker (target color space: sRGB)
CalMAN Colorspace (target color space: sRGB)
CalMAN Saturation Sweeps (target color space: sRGB)
CalMAN Grayscale (target color space: sRGB)

The viewing angles are very good thanks to the IPS technology. Color inverting or dimming are hardly visible even in extreme viewing angles.

Outdoors
Outdoors
Viewing angles

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
48 ms ... rise ↗ and fall ↘ combined↗ 12 ms rise
↘ 36 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.8 (minimum) to 240 (maximum) ms. » 98 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (27.2 ms).
       Response Time 50% Grey to 80% Grey
88 ms ... rise ↗ and fall ↘ combined↗ 36 ms rise
↘ 52 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. » 98 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (44.2 ms).

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: 60 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 1345 (minimum: 43 - maximum: 30860) Hz was measured.


Performance

Mediatek's MT6735 installed in Oukitel's K4000 Pro is an ARM SoC from 2014. Its performance is roughly on the same level as Qualcomm's Snapdragon 410 from the Android rivals (LG Spirit and Motorola Moto E 2015). The processor's 64-bit architecture could not be used at test time because the system ran in Android 5.1 32-bit.

As expected, the review sample's benchmark scores are on par with other entry-level smartphones. However, it does not reach the results of Motorola's Moto E 2015. Oukitel's K4000 Pro can, however, score with comparatively high sequential transfer rates of almost 200 MB/s (read) and 40 MB/s (write) in the "Androbench 4" storage test. Browsing in Chrome mostly functioned without problems. It sometimes took slightly longer for the content to be displayed or refreshed.

The review sample could not identify our Toshiba Exceria Pro M401 micro-SD card, and thus we cannot provide the SD card reader's performance based on our reference card. A Medion micro-SD card (class 6) achieved transfer rates of 17.45 MB/s (read) and 8.31 MB/s (write). By comparison: Samsung's Galaxy S7 (Edge), with good outcomes in the SD card reader test, achieved similar transfer rates (19.38 MB/s read; 8.19 MB/s write).

AndroBench 3-5
Sequential Write 256KB SDCard (sort by value)
Samsung Galaxy S7 (Toshiba Exceria Pro M401)
53.6 MB/s ∼62%
Sequential Read 256KB SDCard (sort by value)
Samsung Galaxy S7 (Toshiba Exceria Pro M401)
72.33 MB/s ∼75%
Random Write 4KB (sort by value)
Oukitel K4000 Pro
7.5 MB/s ∼5%
Motorola Moto E 2. Gen 2015
1.67 MB/s ∼1% -78%
LG Spirit
3 MB/s ∼2% -60%
Samsung Galaxy S7
16.01 MB/s ∼11% +113%
Random Read 4KB (sort by value)
Oukitel K4000 Pro
13.79 MB/s ∼8%
Motorola Moto E 2. Gen 2015
12.08 MB/s ∼7% -12%
LG Spirit
15 MB/s ∼9% +9%
Samsung Galaxy S7
85.9 MB/s ∼51% +523%
Sequential Write 256KB (sort by value)
Oukitel K4000 Pro
39.82 MB/s ∼20%
Motorola Moto E 2. Gen 2015
20.03 MB/s ∼10% -50%
LG Spirit
21 MB/s ∼11% -47%
Samsung Galaxy S7
145.72 MB/s ∼75% +266%
Sequential Read 256KB (sort by value)
Oukitel K4000 Pro
191.29 MB/s ∼24%
Motorola Moto E 2. Gen 2015
100 MB/s ∼13% -48%
LG Spirit
129 MB/s ∼16% -33%
Samsung Galaxy S7
483.82 MB/s ∼61% +153%
Geekbench 3
32 Bit Multi-Core Score (sort by value)
Oukitel K4000 Pro
1346 Points ∼4%
Motorola Moto E 2. Gen 2015
1464 Points ∼5% +9%
32 Bit Single-Core Score (sort by value)
Oukitel K4000 Pro
481 Points ∼10%
Motorola Moto E 2. Gen 2015
481 Points ∼10% 0%
64 Bit Multi-Core Score (sort by value)
LG Spirit
1401 Points ∼4%
Samsung Galaxy S7
6401 Points ∼20%
64 Bit Single-Core Score (sort by value)
LG Spirit
465 Points ∼10%
Samsung Galaxy S7
2199 Points ∼46%
3DMark
2560x1440 Sling Shot Extreme (ES 3.1) Physics (sort by value)
Samsung Galaxy S7
2022 Points ∼79%
2560x1440 Sling Shot Extreme (ES 3.1) Graphics (sort by value)
Samsung Galaxy S7
2216 Points ∼41%
2560x1440 Sling Shot Extreme (ES 3.1) (sort by value)
Samsung Galaxy S7
2170 Points ∼56%
2560x1440 Sling Shot OpenGL ES 3.0 Physics (sort by value)
Oukitel K4000 Pro
604 Points ∼23%
Samsung Galaxy S7
2010 Points ∼78% +233%
2560x1440 Sling Shot OpenGL ES 3.0 Graphics (sort by value)
Oukitel K4000 Pro
100 Points ∼1%
Samsung Galaxy S7
3018 Points ∼39% +2918%
2560x1440 Sling Shot OpenGL ES 3.0 (sort by value)
Oukitel K4000 Pro
123 Points ∼3%
Samsung Galaxy S7
2715 Points ∼56% +2107%
1280x720 offscreen Ice Storm Unlimited Physics (sort by value)
Oukitel K4000 Pro
7370 Points ∼11%
Motorola Moto E 2. Gen 2015
9440 Points ∼14% +28%
LG Spirit
9090 Points ∼13% +23%
Samsung Galaxy S7
19944 Points ∼29% +171%
1280x720 offscreen Ice Storm Unlimited Graphics Score (sort by value)
Oukitel K4000 Pro
2609 Points ∼1%
Motorola Moto E 2. Gen 2015
3969 Points ∼1% +52%
LG Spirit
3822 Points ∼1% +46%
Samsung Galaxy S7
33348 Points ∼7% +1178%
1280x720 offscreen Ice Storm Unlimited Score (sort by value)
Oukitel K4000 Pro
3046 Points ∼2%
Motorola Moto E 2. Gen 2015
4556 Points ∼2% +50%
LG Spirit
4387 Points ∼2% +44%
Samsung Galaxy S7
29015 Points ∼15% +853%
1920x1080 Ice Storm Extreme Physics (sort by value)
Oukitel K4000 Pro
6655 Points ∼10%
Motorola Moto E 2. Gen 2015
8548 Points ∼13% +28%
LG Spirit
8739 Points ∼13% +31%
1920x1080 Ice Storm Extreme Graphics (sort by value)
Oukitel K4000 Pro
1666 Points ∼0%
Motorola Moto E 2. Gen 2015
2091 Points ∼1% +26%
LG Spirit
2190 Points ∼1% +31%
1920x1080 Ice Storm Extreme Score (sort by value)
Oukitel K4000 Pro
1999 Points ∼1%
Motorola Moto E 2. Gen 2015
2513 Points ∼1% +26%
LG Spirit
2628 Points ∼1% +31%
1280x720 Ice Storm Standard Physics (sort by value)
Oukitel K4000 Pro
7266 Points ∼5%
Motorola Moto E 2. Gen 2015
8718 Points ∼6% +20%
LG Spirit
8631 Points ∼6% +19%
1280x720 Ice Storm Standard Graphics (sort by value)
Oukitel K4000 Pro
2614 Points ∼0%
Motorola Moto E 2. Gen 2015
4847 Points ∼1% +85%
LG Spirit
4768 Points ∼1% +82%
1280x720 Ice Storm Standard Score (sort by value)
Oukitel K4000 Pro
3048 Points ∼2%
Motorola Moto E 2. Gen 2015
5378 Points ∼3% +76%
LG Spirit
5295 Points ∼3% +74%
GFXBench (DX / GLBenchmark) 2.7
1920x1080 T-Rex HD Offscreen C24Z16 (sort by value)
Motorola Moto E 2. Gen 2015
5.3 fps ∼0%
Microsoft Lumia 550
3 fps ∼0%
LG Spirit
5.2 fps ∼0%
Samsung Galaxy S7
84 fps ∼6%
T-Rex HD Onscreen C24Z16 (sort by value)
Oukitel K4000 Pro
8.5 fps ∼2%
Motorola Moto E 2. Gen 2015
12 fps ∼3% +41%
Microsoft Lumia 550
5.24 fps ∼1% -38%
LG Spirit
9.6 fps ∼2% +13%
Samsung Galaxy S7
53 fps ∼12% +524%
GFXBench 3.0
off screen Manhattan Offscreen OGL (sort by value)
Oukitel K4000 Pro
1.7 fps ∼0%
Motorola Moto E 2. Gen 2015
1.8 fps ∼0% +6%
LG Spirit
0 fps ∼0% -100%
Samsung Galaxy S7
40 fps ∼7% +2253%
on screen Manhattan Onscreen OGL (sort by value)
Oukitel K4000 Pro
3.5 fps ∼2%
Motorola Moto E 2. Gen 2015
6.4 fps ∼3% +83%
LG Spirit
3.9 fps ∼2% +11%
Samsung Galaxy S7
27 fps ∼12% +671%
GFXBench 3.1
off screen Manhattan ES 3.1 Offscreen (sort by value)
Oukitel K4000 Pro
0.87 fps ∼0%
Samsung Galaxy S7
28 fps ∼7% +3118%
on screen Manhattan ES 3.1 Onscreen (sort by value)
Oukitel K4000 Pro
2.4 fps ∼1%
Samsung Galaxy S7
15 fps ∼9% +525%
PCMark for Android
Work 2.0 battery life (sort by value)
Samsung Galaxy S7
371 min ∼54%
Work 2.0 performance score (sort by value)
Samsung Galaxy S7
3550 Points ∼53%
Work performance score (sort by value)
Oukitel K4000 Pro
2757 Points ∼34%
Samsung Galaxy S7
4826 Points ∼59% +75%
BaseMark OS II
Web (sort by value)
Oukitel K4000 Pro
563 Points ∼37%
Motorola Moto E 2. Gen 2015
580 Points ∼38% +3%
Microsoft Lumia 550
72 Points ∼5% -87%
LG Spirit
603 Points ∼39% +7%
Samsung Galaxy S7
957 Points ∼62% +70%
Graphics (sort by value)
Oukitel K4000 Pro
173 Points ∼2%
Motorola Moto E 2. Gen 2015
312 Points ∼4% +80%
Microsoft Lumia 550
190 Points ∼2% +10%
LG Spirit
311 Points ∼4% +80%
Samsung Galaxy S7
1723 Points ∼20% +896%
Memory (sort by value)
Oukitel K4000 Pro
409 Points ∼11%
Motorola Moto E 2. Gen 2015
369 Points ∼10% -10%
Microsoft Lumia 550
685 Points ∼18% +67%
LG Spirit
312 Points ∼8% -24%
Samsung Galaxy S7
2244 Points ∼58% +449%
System (sort by value)
Oukitel K4000 Pro
840 Points ∼13%
Motorola Moto E 2. Gen 2015
1053 Points ∼16% +25%
Microsoft Lumia 550
529 Points ∼8% -37%
LG Spirit
1050 Points ∼16% +25%
Samsung Galaxy S7
4217 Points ∼64% +402%
Overall (sort by value)
Oukitel K4000 Pro
428 Points ∼13%
Motorola Moto E 2. Gen 2015
515 Points ∼16% +20%
Microsoft Lumia 550
265 Points ∼8% -38%
LG Spirit
498 Points ∼15% +16%
Samsung Galaxy S7
1987 Points ∼60% +364%
JetStream 1.1 - 1.1 Total Score (sort by value)
Oukitel K4000 Pro (Chrome Version 49)
13.445 Points ∼0%
Microsoft Lumia 550 (Microsoft Edge 25)
13.006 Points ∼0% -3%
Samsung Galaxy S7
74 Points ∼0% +450%
Octane V2 - Total Score (sort by value)
Oukitel K4000 Pro (Chrome Version 49)
2200 Points ∼4%
Motorola Moto E 2. Gen 2015 (Google Chrome)
2804 Points ∼6% +27%
Microsoft Lumia 550 (Microsoft Edge 25)
2170 Points ∼4% -1%
LG Spirit (Chrome 42)
2961 Points ∼6% +35%
Samsung Galaxy S7
13161 Points ∼27% +498%
Mozilla Kraken 1.1 - Total Score (sort by value)
Oukitel K4000 Pro (Chrome Version 49)
18250.5 ms * ∼31%
Motorola Moto E 2. Gen 2015 (Google Chrome)
14002.3 ms * ∼24% +23%
Microsoft Lumia 550 (Microsoft Edge 25)
21884 ms * ∼37% -20%
LG Spirit (Chrome 42)
20618 ms * ∼35% -13%
Samsung Galaxy S7
2561.5 ms * ∼4% +86%

Legend

 
Oukitel K4000 Pro Mediatek MT6735, , 16 GB eMMC Flash
 
Motorola Moto E 2. Gen 2015 Qualcomm Snapdragon 410 MSM8916, Qualcomm Adreno 306, 8 GB eMMC Flash
 
Microsoft Lumia 550 Qualcomm Snapdragon 210 MSM8909, Qualcomm Adreno 304, 8 GB eMMC Flash
 
LG Spirit Qualcomm Snapdragon 410 MSM8916, Qualcomm Adreno 306, 8 GB eMMC Flash
 
Samsung Galaxy S7 Samsung Exynos 8890 Octa, ARM Mali-T880 MP12, 32 GB UFS 2.0 Flash

* ... smaller is better

Games

Like the processor, the ARM Mali T720 GPU integrated in Mediatek's SoC is from the entry-level category. Despite some poor benchmark results, the Mali T720 is still enough for playing games from the current generation ("Real Racing 3", "Angry Birds 2") - although that involves fairly long load times. The integrated position sensors also function well. Only the rear-sided speaker is easily covered when playing in landscape mode.

"Real Racing 3"
"Angry Birds 2"

Emissions

Temperature

The temperature development of Oukitel's K4000 Pro remains within limits even in load situations. The maximum measured 40.5 °C (~105 °F) are quite noticeable but not critical. This peak is also limited to one spot (lower third, rear), and is much lower in idle mode with 34.6 °C (~94 °F) at most.

Max. Load
 38.2 °C36.5 °C34.9 °C 
 38.2 °C36.4 °C35.8 °C 
 37.9 °C35.6 °C34.7 °C 
Maximum: 38.2 °C
Average: 36.5 °C
35.4 °C40.5 °C40.1 °C
35.6 °C36.6 °C40.1 °C
34.9 °C34.3 °C39.5 °C
Maximum: 40.5 °C
Average: 37.4 °C
Power Supply (max.)  32.3 °C | Room Temperature 21.9 °C | Voltcraft IR-260

Speaker

The mono speaker in Oukitel's K4000 Pro is quite powerful with a maximum of 87 dB(A). However, the "Pink Noise" evaluation clearly shows that tones below 350 Hz are virtually not reproduced and the sound is concentrated in trebles over 1000 Hz. The handset's sound quality is not impressive; it already sounds tinny at a normal volume, and increases with higher volumes.

"Pink Noise" speaker test

Energy Management

Power Consumption

The standby energy requirement of Oukitel's K4000 Pro is roughly on par with its rivals Lumia 550 and Motorola Moto E 2015. However, the maximum idle consumption of over 4 watts is very high. The handset does not consume significantly more power with 5.4 watts in load situations.

Power Consumption
Off / Standbydarklight 0.09 / 0.19 Watt
Idledarkmidlight 2.74 / 3.92 / 4.05 Watt
Load midlight 4.84 / 5.42 Watt
 color bar
Key: min: dark, med: mid, max: light        Gossen Metrahit Energy

Battery Runtime

The smartphone's battery life is very good: As the 4600 mAh battery suggests that Oukitel's K4000 Pro is a genuine long-runner. The battery lasted 11 hours and 51 minutes in the practical Wi-Fi test (browser script, brightness approx. 150 cd/m², energy-savings mode). None of the selected comparison devices can compete with this battery life. Compared with Huawei's Mate 8 that is equipped with an identically sized battery (4000 mAh) but much larger screen (6 inches), Oukitel's K4000 Pro should have lasted slightly longer in view of the nominal output of 4600 mAh. The completely depleted battery needs about 3 hours and 24 minutes for recharging using the supplied 5 volt power supply.

Battery Runtime
WiFi Surfing v1.3
11h 51min
Oukitel K4000 Pro
, MT6735, 16 GB eMMC Flash
Motorola Moto E 2. Gen 2015
Adreno 306, 410 MSM8916, 8 GB eMMC Flash
Microsoft Lumia 550
Adreno 304, 210 MSM8909, 8 GB eMMC Flash
LG Spirit
Adreno 306, 410 MSM8916, 8 GB eMMC Flash
Samsung Galaxy S7
Mali-T880 MP12, 8890 Octa, 32 GB UFS 2.0 Flash
Huawei Mate 8
Mali-T880 MP4, Kirin 950, 32 GB eMMC Flash
Battery Runtime
-29%
-37%
-5%
-36%
22%
WiFi
WiFi v1.3
711
506
-29%
445
-37%
674
-5%
456
-36%
865
22%

Pro

+ battery life
+ dual-SIM
+ removable battery
+ expandable storage
+ 16 GB flash
+ 2 GB RAM
+ unbreakable glass

Cons

- weight
- handling
- screen's color reproduction
- screen-surface ratio
- GPS module

Verdict

In Review: Oukitel K4000 Pro. Review sample courtesy of Oukitel China.
In Review: Oukitel K4000 Pro. Review sample courtesy of Oukitel China.

Long battery life, decent casing stability and an especially shatterproof screen characterize Oukitel's K4000 Pro. The IPS panel provides good viewing angles and content is displayed in high brightness with high contrast while remaining agreeably sharp.

A question that Oukitel still has to be asked: What target group is the K4000 Pro aimed at? It lacks IP67 certification (dust and waterproof) and a better GPS module for an outdoor device. Much lighter and handier alternatives, such as the Lumia 550 or Motorola Moto E 2015, exist for everyday use. They also offer a better camera and/or more power than Oukitel's K4000 Pro.

With a weight of 250 grams (~8.8 oz) and casing's height of almost 13 millimeters (~0.51 in), Oukitel's K4000 pro is a real heavyweight among smartphones.

However, buyers who can accept the dimensions and the shortcomings of the 5-inch smartphone will find a good entry-level device with an expandable internal storage that is generously sized for the price range. Plus, it does not resent heedlessness, such as bumps or drops.

Oukitel K4000 Pro - 03/26/2016 v5
Marcus Herbrich

Chassis
68%
Keyboard
69 / 75 → 92%
Pointing Device
83%
Connectivity
44 / 60 → 73%
Weight
87%
Battery
95%
Display
80%
Games Performance
5 / 63 → 8%
Application Performance
19 / 70 → 27%
Temperature
88%
Noise
100%
Audio
44 / 91 → 48%
Camera
47%
Average
64%
76%
Smartphone - Weighted Average

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> Notebook / Laptop Reviews and News > Reviews > Oukitel K4000 Pro Smartphone Review
Marcus Herbrich, 2016-04- 5 (Update: 2016-04- 6)