Chuwi Hi9 Air test - tablet with 4G LTE and Helio X20 / X23
Chuwi Hi9 Air
Processor and memory
CPU: MediaTek Helio X20 (MTK6797)
GPU: ARM Mali-T880
RAM: 4GB (LPDDR4)
Internal memory: 64GB (eMMC5.1)
Memory extension: Yes
Display Type: IPS (Full Lamination)
Display diagonal: 10.1 inches
Display resolution: 2560 x 1600 pixels
Multitouch: 10 fingers
Main Camera: 13 Megapixel
Front camera: 5 megapixel
Dual SIM: Yes
SIM size: Micro SIM
GSM 850 / 900 / 1800 / 1900 MHz
WCDMA B1 / B2 / B5 / B8
FDD-LTE B1 / B2 / B3 / B5 / B7 / B8 / B20
WiFi: 802.11 a / b / g / n / ac
Battery: 8.000 mAh
Operating system: Android 8.0
Size: 241.7 172.0 x x 8.4 mm
1x MicroUSB cable
1x user manual
1x warranty card
First impression of the Chuwi Hi9 Air
Update 10. October 2018
Furthermore, there is news around the tablet. So the manufacturer has one recently Revision of the Chuwi Hi9 Air published, which no longer relies on the Helio X20, but has the Helio X23 to the base. Of the Helio X23 SoC is however only one in the achievement cluster faster clocking Helio X20. Instead of using 2.1 GHz, the two Cortex-A72 cores clock with 2.3 GHz.
In addition, Chuwi has one Update on Android 9 provided in promising. All tablets with Helio X20, X23 and X27 processor base are intended Beginning 2019 received an update on Android 9. However, such announcements are to be treated with caution. Only in a few cases, especially Chinese producers keep such promises really!
Design and workmanship
Let's start with the look of the Chuwi Hi9 Air. The case is in the so-called Unibody design held. The decisive factor here is that the back of the case and the case frame are not assembled. Instead, the case is one piece, in this case Aluminium, manufactured. The edges are knotless rounded and unsightly gaps you look in vain.
The tablet is only available in matt black. The disadvantage here is the high susceptibility to fingerprints, Already after unpacking the back was literally littered with fingerprints. Nice is different!
The housing dimensions be 241.7 x 172.0 x 8.4 mm, Chuwi himself gives the case thickness with only 7.8 mm! The Weight: is (still) handy 560g, The tablet feels good in the hand. Holding the tablet in one hand and operating with the other is no problem.
The lateral ones Control buttons are only made of plastic, but have a good pressure point. All connections, cameras and control buttons are designed for landscape use. The rear main camera is detachable Plastic cover surrounded, behind which are the two SIM slots and the microSD memory card slot hide. The connection options amount to one no longer up-to-date MicroUSB socket and an 3.5 mm jack audio jack. An HDMI out unfortunately missed the Chuwi Hi9 Air.
The quality of workmanship corresponds to the price. Except for the vulnerability to fingerprints leaves the case a neat impression. The removable plastic cover sits firmly and shows no signs of wear even after repeated removal and placement.
What's in the box
The What's in the box includes besides the tablet a MicroUSB cable, a USB charger (5V 2A) as well as a user manual and a warranty card. A screen protector is already glued on the display from the factory.
The display is on 10.1 inch IPS display with full lamination technology and high-resolution 2560 x 1600 pixel resolution, A full lamination panel is characterized by a special manufacturing technology in which the LCD, touchscreen and protective glass are not glued together in layers, but form a single unit. Advantages include an overall more compact panel, higher color intensity and better light transmission.
According to the manufacturer, the display reaches one maximum luminance of 400 cd / m², Display measurements showed an average Luminance of only 198 cd / m², To what extent Chuwi has reduced the maximum display brightness only on the software side will hopefully be shown in future updates.
The measured Black Level reached 0.17 cd / m². Das contrast ratio is 1158:1, The measurements give a disappointing display brightness, a useful black level and a concomitant acceptable contrast ratio. Disappointing is unfortunately the sRGB color accuracy out. Measured with sRGB color settings, the average color difference is one Delta E of 10.9.
Display in everyday life
In everyday life, the display presents itself with special rich colors, Serious impairments of color constancy and contrast ratio do not occur at flat viewing angles. On light backlight bleeding can be detected at the lower edge of the display.
What disturbs visually and haptically is the factory-applied screen protector. Not only is it prone to fingerprints and scratches, it also shows miserable slipperiness and affects color reproduction. Outdoor readability is severely limited by the low luminance and the screen protector used by Chuwi.
Display settings and functions
With the help of the display function "Miravision", the presentation can be customized according to your own wishes. There are options for contrast, color saturation, image brightness, image sharpness and color temperature. A special one Reading and night mode is available. This can not be timed, but only activated manually via MiraVision. Unfortunately, the tablet misses an ambient light sensor, so that an automatic adjustment of the display brightness to the ambient light is not possible.
Touch input and swipe gestures are detected accurately. Multitouch is supported with up to 10 concurrent inputs. A noticeable input delay does not occur.
Performance and user interface
Processor and memory
The system-on-chip of the Chuwi Hi9 Air is a MediaTek MTK6797, better known as MediaTek Helio X20, The beginning 2016 published and manufactured in the 20 nm procedure has already some years on the back and is not a classical processor one expects in a Tablet. Rather, the SoC was designed specifically for smartphones.
The CPU the Helio X20 takes off 10 processor cores together, which in turn subdivide into 3 clusters. Cluster 1 understands itself as performance cluster and consists of two Cortex A72 coresthat clock up to 2.3 GHz. Cluster 2 consists four Cortex A53 coresthat clock up to 1.85 GHz. Cluster 3 is a Power Save Cluster whose four Cortex A53 cores clock with 1.4 GHz. The But by the full GPU acceleration tech is a ARM Mali-T880 MP4 which clocks up to 780 MHz.
The storage facilities amounts to one 4GB LPDDR4 memory and one 64GB eMMC5.1 data store, A memory expansion by MicroSD memory card is possible. The measured in the test memory speeds disappoint. Especially the RAM Speed is behind expectations and only achieves 4533 MB / s, Also the data storage is with one write speed about 107 MB / s and a reading speed from 116 MB / s not very fast.
The Chuwi Hi9 Air is already with current Android 8.0 delivered. The user interface is based largely on Stock Android, There are no third-party apps or manufacturer modifications. System updates can Over-the-Air (OTA) be received. Project Treble is supported, but not with seamless updates.
Performance in everyday life
In everyday life, the Chuwi Tablet shows significant performance weaknesses. For long loading times and jerky animations you should be prepared! be added regular total crashes which seriously affect the user experience. The most curious mistake that occurred during the test phase, however, was that the tablet did not wake up after switching off the display and a restart was necessary. Here only a factory reset helped.
Video and gaming
Zum Stream YouTube, Netflix, and other video services is the Hi9 Air quite suitable. High-resolution 1440p YouTube videos play smoothly. The same applies to Netflix, which is only streamed in SD due to lack of Widevine Level 1 support (DRM).
Current Mobile Games, such as PUBG are executable and playable. To achieve a reasonably fluid and stable frame rate, low graphics settings are required. After 30 minutes Gamen lies the back measured heat generation at close 35°C, Due to the lack of a gyroscope, games with motion control are not playable.
The tablet is with a back 13 Megapixel main camera with LED flash and a front side 5 megapixel front camera equipped.
Pictures taken with the main camera are distorted in color, pale and washed out. In addition, photos are often taken blurred, as well as missing the recordings a certain degree of detail. With increasingly poorer lighting conditions that decreases noise clearly and shots become visibly blurred again. The preinstalled MediaTek Camera App is not optimized and will be displayed in the wrong resolution. This results in an oversized user interface.
Videos takes the main camera with maximum 3840 x 2176 pixel resolution on. The refresh rate achieves reasonably smooth 21 images per second under good lighting conditions. In low light conditions, the refresh rate is reduced to about 9 pictures-per-second. The recording quality is clear, if slightly tinny.
There is also little positive Recording quality of the front camera to report. This is suitable for video telephony, but less for selfies. Colors are mostly pale and a coarse image grain makes itself felt in good lighting conditions. Videos captures the front camera with maximum 1920 x 1080 pixel resolution.
The Chuwi Hi9 Air is with two micro SIM slots equipped in the Dual standby mode can be operated. The usual in this country 2G, 3G and 4G Cellular frequencies and bands are supported. Next to the mobile surfing is it possible with the tablet too phone and Short messages (SMS) to send.
The signal strength showed clear weaknesses in the test. Im 4G LTE network logged in, the tablet is signal weak and achieves only a low data throughput. The voice quality is overgrown.
Wi-Fi and Bluetooth
Much better is the tablet in Wi-Fi and Bluetooth composite. Get supported Dual-band AC WiFi and Bluetooth 4.2, In WLAN, the Hi9 Air impresses with its reasonable data throughput and constant signal strength. The same applies to the Bluetooth network. Several Bluetooth devices could be connected and used without errors during the test.
GPS and sensors
An GPS module is available. A GPS fix finds the tablet after a few seconds. The positioning is accurate to a few meters and also allows you to navigate with the tablet. However, an e-compass is missing. The sensory equipment is clear. Installed is only an acceleration sensor.
Audio and FM radio
The Chuwi Hi9 Air is with two speakers equipped, which are located on the left and right of the frame top. If you use the tablet in landscape mode, these are not obscured. The sound quality is still acceptable. What is missing the speakers is the certain "kick". The maximum playback volume is comparatively low, as well as the speakers sound rather flat. The sound quality of the 3.5 mm jack audio jack is neat.
An interesting feature is the integrated FM radio, To use the function, a headphone must be connected via the 3.5 mm audio jack. This serves as an antenna and allows reception. The receiving radio station can then be played back via the headphones or the loudspeaker. In the test, the radio feature worked as it should.
The capacity of the battery gives Chuwi 8.000 mAh at. The in the benchmark on medium display brightness reached Screen-on-Time is almost 9 hours. The achieved in everyday life average battery life is about 7 hours.
With intensive use, the runtime is reduced to about 4 hours. A charging process from 0 - 100% takes 6 hours.