Teclast T40 Plus: Affordable LTE tablet in review
Teclast has already appeared frequently in our news and with hands-on tests of the Teclast M40 and Teclast P20HD we could already get an impression of the manufacturer's quality. With the Teclast T40 Plus, a tablet is now offered that could be an alternative to other inexpensive devices thanks to LTE and a price of approximately 200 Euros (~$232).
Possible competitors in comparison
Rating | Date | Model | Weight | Height | Size | Resolution | Price |
|---|---|---|---|---|---|---|---|
| 79.9 % v7 (old) | 11 / 2021 | Teclast T40 Plus T618, Mali-G52 MP2 | 455 g | 10 mm | 10.40" | 2000x1200 | |
| 83.4 % v7 (old) | 10 / 2021 | Lenovo Yoga Tab 11 Helio G90T, Mali-G76 MP4 | 655 g | 7.9 mm | 11.00" | 2000x1200 | |
| 74.3 % v7 (old) | 09 / 2021 | Blackview Tab 10 Helio MT8768, PowerVR GE8320 | 523 g | 8.4 mm | 10.10" | 1920x1080 | |
| 81.7 % v7 (old) | 11 / 2020 | Samsung Galaxy Tab A7 10.4 (2020) SD 662, Adreno 610 | 477 g | 7 mm | 10.40" | 2000x1200 |
Case - aluminum tablet with plastic part
Teclast manufactures the casing of the T40 Plus from an aluminum alloy and plastic, which makes the device look comparatively high-quality. On the back, the different materials stand out from each other with different colors, but the transitions are even. Overall, the build quality is good.
However, the camera sensor on the back of our test model was not centered under the lens, which had negative consequences for the picture quality. However, we cannot judge whether this defect occurs more often.
In the pictures provided by the manufacturer, the bezel around the display looks a bit narrower than it actually is. The tablet is also thicker than it appears in the pictures. However, the actual dimensions correspond to those of other devices in this price range and with only 455 grams (~16 oz), the Android tablet is comparatively light.
Features - jack and microSD
The Teclast T40 Plus is equipped with a 3.5 mm jack and a USB-C port with USB 2.0 standard. This is OTG-capable, so it can charge connected devices and also provides connected mass storage as a drive.
Extras like a notification LED or an infrared port are not available. The Camera2 API is available with Limited. NFC, a radio receiver and DRM Widevine L1 were omitted.
microSD card reader
A microSD card reader is installed in the T40 Plus, which only achieves a low speed of 26.36 MB/s when copying data with our reference memory card AV Pro V60. When a microSD card is inserted, it also blocks the second NanoSIM slot.
| SD Card Reader - average JPG Copy Test (av. of 3 runs) | |
| Teclast T40 Plus (Angelbird AV Pro V60) | |
| Lenovo Yoga Tab 11 (Angelbird V60) | |
Cross Platform Disk Test (CPDT)
Software - Pure Android
The Teclast T40 Plus runs a pure Android-11 system. Accordingly, no third-party apps or programs from the manufacturer are installed.
The security updates were up to April 5, 2021 at the time of the test. It is not possible to say how regularly they will be released.
Communication and GNSS - On the move with LTE and WiFi 5
Teclast's tablet can establish mobile connections via GSM, 3G and LTE. The installed SoC supports LTE up to Cat.7 in the downstream and Cat. 4 in the upstream, which enables speeds of up to 300 MBit/s (download) and 50 MBit/s (upload). VoLTE can also be used, which means that the tablet is also suitable for making calls.
Bluetooth 5.0 and WiFi 5 can be used for wireless connections in close range. With our reference router Netgear Nighthawk AX12, we achieved speeds of 305 MBit/s during transmission and 327 MBit/s during data reception. Thus, the Teclast T40 Plus is on par with our test field.
| Networking | |
| iperf3 transmit AX12 | |
| Samsung Galaxy Tab A7 10.4 (2020) | |
| Blackview Tab 10 | |
| Teclast T40 Plus | |
| Lenovo Yoga Tab 11 | |
| iperf3 receive AX12 | |
| Blackview Tab 10 | |
| Samsung Galaxy Tab A7 10.4 (2020) | |
| Teclast T40 Plus | |
| Lenovo Yoga Tab 11 | |
The T40 Plus can determine its location outdoors to a very good value of up to two meters (~6.6 feet) with the "GPS Test" app.
On our obligatory bike tour, the Teclast tablet only shows inaccuracies in curves and also a clear outlier when going around the lake. It is nevertheless suitable for navigation tasks.
Cameras - sensor not quite centered
Teclast equips the T40 Plus with an 8 MP main camera and a 5 MP front-facing camera. The latter takes portrait pictures that show weak contrast and look too dark and blurry even in very good light. The main camera shows our test subject with pale colors and a moderate level of detail. The black scattering on the right side of the picture is caused by the camera sensor, which is not located centrally behind the lens in our test model. Our panorama shot also shows that the camera does not cope well with uneven lighting conditions. When zooming in, subjects look muddy and practically nothing is visible in the low-light image. Apart from the option to switch on an HDR mode, no other adjustments can be made to the image quality.
Video recordings show a similar quality as our test photos. The main camera supports 480p, 720p and 1080p resolutions, and the front camera 480p and 720p. There is no information about the fps, nor are there any manual settings.
Under controlled lighting conditions, the Teclast T40 Plus records the ColorChecker passport too brightly. The test chart also clearly shows contrast weaknesses in the corners, whereby the right side in the picture is again affected by the crooked camera lens.
Accessories and warranty - cover included
The T40 Plus comes with a USB power adapter with a matching USB-C cable, a SIM needle, and a protection cover that can also be folded over the display and serve as a stand.
Teclast grants a warranty period of 12 months.
Input devices & operation - Good touchscreen
Google's GBoard is available for text input on the T40 Plus. The touchscreen responds very well to touches and is also suitable for extensive swipe movements. Switching from portrait to landscape mode is also quick.
Display - Bright and flicker-free
The screen of the Teclast T40 Plus consists of a 10.4-inch IPS panel and offers a resolution of 2000 x 1200 pixels. A brightness sensor is not present.
The maximum adjustable brightness is on a high level with an average of 486 cd/m². The illumination of 92 percent is also very good. We measured a maximum of 477 cd/m² in the APL50 test and the lowest possible brightness level is quite high at 39.9 cd/m².
The brightness control does not rely on the use of PWM.
| |||||||||||||||||||||||||
Brightness Distribution: 92 %
Center on Battery: 496 cd/m²
Contrast: 1240:1 (Black: 0.4 cd/m²)
ΔE Color 3.1 | 0.5-29.43 Ø4.88
ΔE Greyscale 5.1 | 0.5-98 Ø5.1
96.6% sRGB (Calman 2D)
Gamma: 2.33
| Teclast T40 Plus IPS, 2000x1200, 10.4" | Lenovo Yoga Tab 11 IPS LCD, 2000x1200, 11" | Blackview Tab 10 IPS, 1920x1080, 10.1" | Samsung Galaxy Tab A7 10.4 (2020) TFT-LCD, 2000x1200, 10.4" | |
|---|---|---|---|---|
| Screen | -6% | -68% | -9% | |
| Brightness middle | 496 | 380 -23% | 467 -6% | 365 -26% |
| Brightness | 486 | 376 -23% | 445 -8% | 337 -31% |
| Brightness Distribution | 92 | 89 -3% | 89 -3% | 82 -11% |
| Black Level * | 0.4 | 0.24 40% | 0.66 -65% | 0.26 35% |
| Contrast | 1240 | 1583 28% | 708 -43% | 1404 13% |
| Colorchecker dE 2000 * | 3.1 | 4.61 -49% | 9.9 -219% | 4.5 -45% |
| Colorchecker dE 2000 max. * | 7.6 | 8.77 -15% | 15.66 -106% | 7.8 -3% |
| Greyscale dE 2000 * | 5.1 | 5.1 -0% | 9.9 -94% | 5.3 -4% |
| Gamma | 2.33 94% | 2.248 98% | 1.72 128% | 2.12 104% |
| CCT | 6819 95% | 7966 82% | 9142 71% | 7702 84% |
* ... smaller is better
Screen Flickering / PWM (Pulse-Width Modulation)
| 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 8529 (minimum: 5 - maximum: 343500) Hz was measured. | |||
The settings menu of the T40 Plus allows you to adjust colors and contrast manually or have them regulated automatically. With the "Automatic contrast" setting and the "Warm" color profile, colors are displayed with an only slightly increased DeltaE-2000 deviation of 5.1.
Display Response Times
| ↔ Response Time Black to White | ||
|---|---|---|
| 19.2 ms ... rise ↗ and fall ↘ combined | ↗ 8.4 ms rise |  |
| ↘ 10.8 ms fall | ||
| The screen shows good response rates in our tests, but may be too slow for competitive gamers. In comparison, all tested devices range from 0.1 (minimum) to 240 (maximum) ms. » 39 % of all devices are better. This means that the measured response time is similar to the average of all tested devices (20.8 ms). | ||
| ↔ Response Time 50% Grey to 80% Grey | ||
| 41.2 ms ... rise ↗ and fall ↘ combined | ↗ 21.2 ms rise |  |
| ↘ 20 ms fall | ||
| The screen shows slow response rates in our tests and will be unsatisfactory for gamers. In comparison, all tested devices range from 0.165 (minimum) to 636 (maximum) ms. » 64 % of all devices are better. This means that the measured response time is worse than the average of all tested devices (32.5 ms). | ||
The high display brightness makes the Teclast T40 Plus quite suitable for outdoor use. However, depending on the environment, annoying reflections and glare might occur.
The IPS panel of the T40 Plus is very viewing angle stable. Thus, content can be viewed even from flat angles without being distorted or displayed with distorted colors.
Performance - Simple Android tablet
The Teclast T40 Plus is equipped with a UNISOC Tiger T618 and 8 GB of RAM take care of the system operation. The T618 is an older SoC from 2019 and can smoothly render the system as well as simple everyday applications. For graphical content, the internal GPU ARM Mali-G52 MP2 is responsible.
In the benchmarks, the system performance of the T40 Plus is on par with the Qualcomm Snapdragon 662 in the Samsung Galaxy Tab A7 LTE. In return, the graphics performance is slightly better in the Teclast tablet, but it cannot compete with, for example, the Lenovo Yoga Tab 11. Overall, the performance is appropriate for the price range.
| PCMark for Android | |
| Work 3.0 | |
| Average of class Tablet (3195 - 20841, n=73, last 2 years) | |
| Lenovo Yoga Tab 11 | |
| Teclast T40 Plus | |
| Average UNISOC T618 (7404 - 8414, n=5) | |
| Blackview Tab 10 | |
| Work 2.0 performance score | |
| Samsung Galaxy Tab A7 10.4 (2020) | |
| Average UNISOC T618 (82 - 6937, n=2) | |
| GFXBench (DX / GLBenchmark) 2.7 | |
| T-Rex Onscreen | |
| Average of class Tablet (14 - 144, n=65, last 2 years) | |
| Lenovo Yoga Tab 11 | |
| Teclast T40 Plus | |
| Average UNISOC T618 (37 - 42, n=6) | |
| Samsung Galaxy Tab A7 10.4 (2020) | |
| 1920x1080 T-Rex Offscreen | |
| Average of class Tablet (15 - 809, n=65, last 2 years) | |
| Lenovo Yoga Tab 11 | |
| Teclast T40 Plus | |
| Average UNISOC T618 (41 - 44, n=6) | |
| Samsung Galaxy Tab A7 10.4 (2020) | |
| GFXBench 3.0 | |
| on screen Manhattan Onscreen OGL | |
| Average of class Tablet (8.1 - 122, n=65, last 2 years) | |
| Lenovo Yoga Tab 11 | |
| Teclast T40 Plus | |
| Average UNISOC T618 (22 - 25, n=6) | |
| Samsung Galaxy Tab A7 10.4 (2020) | |
| 1920x1080 1080p Manhattan Offscreen | |
| Average of class Tablet (7.3 - 530, n=65, last 2 years) | |
| Lenovo Yoga Tab 11 | |
| Teclast T40 Plus | |
| Average UNISOC T618 (26 - 26, n=6) | |
| Samsung Galaxy Tab A7 10.4 (2020) | |
| GFXBench 3.1 | |
| on screen Manhattan ES 3.1 Onscreen | |
| Average of class Tablet (4.8 - 120, n=65, last 2 years) | |
| Lenovo Yoga Tab 11 | |
| Teclast T40 Plus | |
| Average UNISOC T618 (13 - 15, n=6) | |
| Samsung Galaxy Tab A7 10.4 (2020) | |
| 1920x1080 Manhattan ES 3.1 Offscreen | |
| Average of class Tablet (5 - 400, n=65, last 2 years) | |
| Lenovo Yoga Tab 11 | |
| Average UNISOC T618 (15 - 16, n=6) | |
| Teclast T40 Plus | |
| Samsung Galaxy Tab A7 10.4 (2020) | |
| AnTuTu v8 - Total Score | |
| Teclast T40 Plus | |
| Average UNISOC T618 (173051 - 203961, n=3) | |
| Samsung Galaxy Tab A7 10.4 (2020) | |
The Teclast T40 Plus achieves a comparatively good result in the browser benchmarks and can take first place in our test field in WebXPRT 3 and Mozilla Kraken 1.1. In everyday use, websites are built quickly and scroll smoothly. Media content is also provided quickly.
| JetStream 1.1 - Total Score | |
| Lenovo Yoga Tab 11 (Chrome93) | |
| Teclast T40 Plus (Chrome 95) | |
| Average UNISOC T618 (63.2 - 75.3, n=4) | |
| Samsung Galaxy Tab A7 10.4 (2020) (Chrome 86.0.4240.185) | |
| WebXPRT 3 - Overall | |
| Average of class Tablet (36 - 435, n=39, last 2 years) | |
| Average UNISOC T618 (68 - 93, n=6) | |
| Teclast T40 Plus (Chrome 95) | |
| Lenovo Yoga Tab 11 (Chrome93) | |
| Samsung Galaxy Tab A7 10.4 (2020) (Chrome 86.0.4240.185) | |
| Blackview Tab 10 (Chrome 93.0.4577.62) | |
| Octane V2 - Total Score | |
| Average of class Tablet (763 - 105178, n=87, last 2 years) | |
| Lenovo Yoga Tab 11 (Chrome93) | |
| Teclast T40 Plus (Chrome 95) | |
| Average UNISOC T618 (10787 - 14722, n=6) | |
| Samsung Galaxy Tab A7 10.4 (2020) (Chrome 86.0.4240.185) | |
| Mozilla Kraken 1.1 - Total | |
| Blackview Tab 10 (Chrome 93.0.4577.62) | |
| Samsung Galaxy Tab A7 10.4 (2020) (Chrome 86.0.4240.185) | |
| Lenovo Yoga Tab 11 (Chrome93) | |
| Average of class Tablet (319 - 34733, n=74, last 2 years) | |
| Average UNISOC T618 (2762 - 3432, n=6) | |
| Teclast T40 Plus (Chrome 95) | |
* ... smaller is better
Teclast installs a 128 GB eMMC flash storage in the T40 Plus. This only offers low read and write rates, which is primarily reflected in slower access to stored data.
| Teclast T40 Plus | Lenovo Yoga Tab 11 | Blackview Tab 10 | Samsung Galaxy Tab A7 10.4 (2020) | Average 128 GB eMMC Flash | Average of class Tablet | |
|---|---|---|---|---|---|---|
| AndroBench 3-5 | 451% | 10% | 166% | 144% | 712% | |
| Sequential Read 256KB | 151.1 | 503 233% | 263.6 74% | 298 97% | 295 ? 95% | 1158 ? 666% |
| Sequential Write 256KB | 136.8 | 374.4 174% | 135.3 -1% | 89.9 -34% | 195.4 ? 43% | 797 ? 483% |
| Random Read 4KB | 29.24 | 136.8 368% | 31.37 7% | 82 180% | 84.1 ? 188% | 196.5 ? 572% |
| Random Write 4KB | 16.12 | 182.2 1030% | 9.4 -42% | 83.6 419% | 56.4 ? 250% | 197.4 ? 1125% |
Emissions - Moderate temperatures and high volume
Temperature
According to our measurements, the surfaces of the T40 Plus heat up to 35.2 °C (~95 °F). Thus, the Android tablet only heats up moderately and can be held in the hand at any time, for example. The Wildlife endurance stress tests also show that the performance remains stable even under heavy load.
3DMark Wild Life Stress Test
(+) The maximum temperature on the upper side is 35.2 °C / 95 F, compared to the average of 33.7 °C / 93 F, ranging from 20.7 to 53.2 °C for the class Tablet.
(+) The bottom heats up to a maximum of 32.8 °C / 91 F, compared to the average of 33.2 °C / 92 F
(+) In idle usage, the average temperature for the upper side is 30.3 °C / 87 F, compared to the device average of 30 °C / 86 F.
Speaker
The speakers of the Teclast T40 Plus can play relatively loud and offer a sound spectrum that is pronounced on the higher tones. Thus, they are suitable for playing voice content, but external speakers or headphones are recommended for more complex media content. These can be connected via the 3.5 mm jack, for example, which works with an acceptable signal-to-noise ratio of 64.52 dBFS.
Teclast T40 Plus audio analysis
(+) | speakers can play relatively loud (93.7 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 24.8% lower than median
(+) | bass is linear (1.6% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | reduced mids - on average 8.1% lower than median
(+) | mids are linear (4.9% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 4.6% away from median
(+) | highs are linear (3% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (18.5% difference to median)
Compared to same class
» 42% of all tested devices in this class were better, 7% similar, 50% worse
» The best had a delta of 7%, average was 22%, worst was 129%
Compared to all devices tested
» 38% of all tested devices were better, 8% similar, 54% worse
» The best had a delta of 4%, average was 24%, worst was 134%
Lenovo Yoga Tab 11 audio analysis
(+) | speakers can play relatively loud (84.2 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 12% lower than median
(±) | linearity of bass is average (13.4% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 2.7% away from median
(+) | mids are linear (3.1% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 3.8% away from median
(+) | highs are linear (6.9% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (11.8% difference to median)
Compared to same class
» 12% of all tested devices in this class were better, 4% similar, 84% worse
» The best had a delta of 7%, average was 22%, worst was 129%
Compared to all devices tested
» 7% of all tested devices were better, 2% similar, 91% worse
» The best had a delta of 4%, average was 24%, worst was 134%
Power management - frugal 10-inch tablet
Energy consumption
With a maximum power consumption of 5.94 watts under load, the Teclast T40 Plus is the most frugal tablet in our test field.
The included USB power adapter has an output power of 12.5 watts and is thus sufficiently high.
| Off / Standby |   0.55 / 0.14 Watt |
| Idle |  1.11 / 1.13 / 1.62 Watt |
| Load |
4.01 / 5.94 Watt |
    
| |
Key:
min: ,
med: ,
max: Metrahit Energy | |
| Teclast T40 Plus 6600 mAh | Lenovo Yoga Tab 11 7700 mAh | Blackview Tab 10 7480 mAh | Samsung Galaxy Tab A7 10.4 (2020) 7040 mAh | |
|---|---|---|---|---|
| Power Consumption | -26% | -179% | -137% | |
| Idle Minimum * | 1.11 | 1.2 -8% | 2 -80% | 1.18 -6% |
| Idle Average * | 1.13 | 1.5 -33% | 6 -431% | 4.92 -335% |
| Idle Maximum * | 1.62 | 1.9 -17% | 6.1 -277% | 4.95 -206% |
| Load Average * | 4.01 | 4.9 -22% | 6.8 -70% | 7.21 -80% |
| Load Maximum * | 5.94 | 8.8 -48% | 8.1 -36% | 9.32 -57% |
* ... smaller is better
Power consumption: Geekbench (150 cd/m²)
Power consumption: GFXBench (150 cd/m²)
Battery life
The Teclast T40 Pro achieves a runtime of 12 hours and 38 minutes in our practical Wi-Fi test. Thus, it can make good use of its 6,600 mAh battery and achieves a similar value as competing devices with generally larger battery capacities.
The tablet is fully recharged after about three and a half hours with the included charger.
| Teclast T40 Plus 6600 mAh | Lenovo Yoga Tab 11 7700 mAh | Blackview Tab 10 7480 mAh | Samsung Galaxy Tab A7 10.4 (2020) 7040 mAh | |
|---|---|---|---|---|
| Battery Runtime | ||||
| WiFi v1.3 | 758 | 891 18% | 774 2% | 757 0% |
Pros
Cons
Verdict - Suitable for everyday use
The Teclast T40 Plus proves to be an inexpensive tablet for simple daily applications in our test. The build quality is basically good, but there can be flaws in individual devices, as the slipped camera sensor on the back of our test model shows. The headphone jack and the 128 GB internal storage as well as LTE round off the otherwise sparse equipment package.
Thanks to a good display, long battery life and low price, the Teclast T40 is a tablet suitable for everyday use.
However, the very good battery runtime and the bright display are also good for daily use. Since the latter is PWM-free and reproduces colors relatively well, it is also well suited for sensitive eyes. If the internal storage is not enough, you can also expand it via microSD card.
Among the inexpensive tablets, Teclast places the T40 Plus in line with the Samsung Galaxy Tab A7 LTE and the Lenovo Yoga Tab 11. However, those who can spend a bit more money will quickly end up with the Apple iPad 10.2 as a strong alternative.
Price and availability
The Teclast T40 Plus is currently only available from Amazon (DE) but it can also be ordered via AliExpress, for example.
Teclast T40 Plus
- 10/25/2021 v7 (old)
Mike Wobker
Price comparison
