[Device Reviews and Information] uncleabubear:
CHUWI Hi9 Air 64GB MT6797 X20 Deca Core 10.1 Inch 2K Screen Android 8..0 Dual 4G Tablet

Specifications

Model CHUWI Hi9 Air

CPU MTK6797 Helio X20 Deca Core 20nm

A72*2 2.3 GHz

A53*4 1.4 GHz

A53*4 1.85 GHz

GPU ARM Mali-T880 780MHz

System Android 8.0

RAM 4GB DDR3

Capacity 64GB EMMC

Screen 10.1 Inch IPS Capacitive Screen

Resolution 2560*1600

299 PPI Pixel Density

OGS One Glass Solution Fully Laminated

Camera Front is 5.0MP Rear is 13.0MP

Microphone Built-in

Speaker Built-in

WIFI 802.11 a/b/g/n/ac(support 2.4GHz and 5.0 GHz)

Bluetooth 4.2

GPS Support

G-sensor Support

Brand(Network)

GSM: (Please see pictures below)

WCDMA: (Please see pictures below)

LTE:1/2/3/4/5/7/8/12/17/20/28/38/39/40/41

OTG Support

TF Card Support (Maximum support 128G)

Audio AAC,AMR,MP3,OGG,WAV,ACC,M4A,FLAC

Picture JPEG,GIF,BMP,PNG,JPG

Video 3GP,AVI,MKV,MP4,M4V,WEBM,MPEG4

Language Multi-language

I/O Port 1 x Micro USB port

1 x 3.5mm Earphone port

1 x TF card slot(Max Support 128G)

2 x Micro SIM Card slot

Battery 8000mAh

Weight 550g

Size 241.7*172*7.9mm

In Box

1 x CHUWI Hi9 Air Tablet PC

1 x USB Cable

1 x Charger

1 x Adapter (the adapter depends on the country of the buyer.)

Home page https://en.chuwi.com/

Image of Front

Image of Back

Image of Buttons

Videos

Chuwi Hi9 Air, Unboxing, Review.

Review by @Alberto96

How to Update

Android Security Updates go to Settings >System >System Update >Check for update

Wireless Update (OTA) go to Settings >System >About Tablet >Wireless Update >Check for updates >Download >Install now >OK and System reboot.

Backup NVRAM/IMEI http://www.anythingultimate.in/2015/11/how-to-backup-your-nvram-partition.html

Downloads

Tutorial

Flash Tool and MTK Drivers for Windows

Minimal ADB and Fastboot

DA file (place in same directory as flash_tool.exe)

Stock Rom Build number O00623 release-keys 20180506 Unavailable

Stock Rom Build number O00623 release-keys 20180604

Stock Rom Build number O00623 release-keys 20180809

OTA Wireless Update Stock Rom Build number O00623 release-keys 20181010 Settings>System>About tablet>Wireless Update>Local updates>Select file>Install Now

Stock Rom Build number O00623 release-keys 20181122

TWRP created by @Alberto96 Download twrp_3.2.2-0_Hi9Air.zip (Works with Stock Rom 20180604)

Download SuperSU TWRP Zip

Download Magisk TWRP Zip

How to Flash Stock Rom

Download and extract stock ROM

Download and extract flashtool and install mtk driver (disable driver signature enforcement)

Get rid of any chinese characters in directory names

Download da file to flashtool directory

Open flashtool and open da file and open scatter file in stock ROM directory

Click download

Plug in powered off tablet

Wait for ok

Flash not working? Troubleshoot

Ignore any errors

Use flashtool in link

Get rid of any chinese characters in directory names

Open and close flashtool a few times before you click download

How to Root

There are three ways to root.

1. Install twrp then install supersu with zip.

2. Install twrp then install magisk with zip.

3. Flash magisk modified boot.img.

How to install Twrp https://www.xda-developers.com/how-to-install-twrp/

TWRP Custom Recovery created by @Alberto96

SuperSU Download SuperSU TWRP Zip

Install supersu or magisk with zip file using twrp> install

Magisk https://xdaforums.com/apps/magisk/official-magisk-v7-universal-systemless-t3473445

Download Magisk TWRP Zip

MTK Drivers and ADB required

How to install magisk with modified boot.img

;

Backup your data, tablet will be wiped

download patched_boot.img Stock Rom Build number O00623 release-keys 20180506

OR patched_boot.img Stock Rom Build number O00623 release-keys 20180604

OR patched_boot.img Stock Rom Build number O00623 release-keys 20180809

to adb directory in PC

enable developer options, settings, system, about tablet, build number, tap until developer

connect cable to pc

settings, system, developer options, enable oem unlocking

settings, system, developer options, enable usb debugging

allow usb devices

adb reboot bootloader or shutdown and then press power + volume up, select fastboot

fastboot oem unlock

press volume up (yes)

fastboot flash boot patched_boot.img

OKAY

fastboot reboot OR cycle power to reboot, erasing device is normal

restore tablet (copy your data)

Install latest Magisk Manager

run magisk manager

Check for Root with Root Checker

Your Hi9 Air is rooted with Magisk!

Time to Boot 30s

Available space first boot 56.5 GB

7.47/64 GB MB Used

Pre-installed bloat NONE!

How to take a screenshot

Press Power + Volume Down at the same time.

Support. Install latest build before requesting support.

Submit a support ticket with Chuwi here

Known Issues

(Solved) Screen brightness slider doesn't work

(Solved) Settings > Security & Location > Data Protection > Message ( Data Protection has stopped )

(Solved) Battery only charges to 98% with supplied charger and cable.

(Solved) FM Radio not working. Reported by @moksone [/URL]

(Solved) Power button wake up unresponsive. Factory reset or hold power button until reboots. Reported by @moksone

(Solved) Screen is brighter in the center like a rectangle shape. Reported by @moksone Replaced by Banggood

(Solved) Tablet randomising MAC address. Reported by @Yesfan001 (Chuwi aware) Entering serial number and permanent WiFi MAC address

(Solved) Random reboots, freezes.

(Solved) Uncertified Android Device

(Solved) After Reboot Wifi disabled

(Never to be solved) Netflix only works at qHD 960x540

Issues with 4G + Bluetooth

Chuwi Hi9 Air to Chromecast with Google Home App, screen on it's side (Chuwi aware)

(Solved) O00623 release-keys 20180905 Update Bug Settings>System>About tablet>"Wireless Update" replaced with com.adups.fota.MyApplication and disabled. (Chuwi aware)

O00623 release-keys 20180905 Update Bug no.2 Play Store>Settings>Play Protect certification>Device is not certified. If you clear play store data and cache play protect certification disappears.

How to enable Split Screen

Open two apps

Tap and hold android menu or overview button, select second app

You can drag the middle point

Apps tested and working

Advanced Power Menu [ROOT]

Buffer

Control Screen Orientation

Duo

Find My Device

Fitbit

GMD Immersive (hides soft keys)

IFTTT

MacroDroid

Mr. Number

Netflix (qHD 960x540)

Open Camera

Phone Check

Prey

Rolo

Shazam

Signal

Skype

Uber

Waze

Whatsapp

YouTube (Up to 1440p)

Accessories

Cases

Benchmarks

Antutu Pass 1

Antutu Pass 2

3DMark Ice Storm Extreme and Sling Shot Extreme

Geekbench Single Core

Geekbench Multi-core

Geekbench Compute

Geekbench Battery

Androbench (Storage Benchmark)

GPS

Home Screen

Teamviewer

Wifi

2G/3G/4G/LTE Cat 6 Bands (Support for LTE:1/2/3/4/5/7/8/12/17/20/28/38/39/40/41)

Stock Apps

Treble Supported but A-System partition only

Battery Performance Normal Use 7-8 hours

Updates

09/04/2018 I Ordered / pre-ordered

13/04/2018 New video

06/05/2018 Received my Chuwi Hi9 Air yesterday Saturday 05/05/18

10/05/2018 Review posted to youtube see above

11/05/2018 More pictures and info

25/05/2018 Link to cases

04/06/2018 Added links to downloads

05/06/2018 Added how to flash, how to install magisk and updated known issues

18/06/2018 Added alternate download link and updated known issues

20/06/2018 Added TWRP

01/09/2018 Added links to Build 20180809

03/11/2018 Added O00623 release-keys 20180905 Update Bugs

08/11/2018 Download OTA 20181010

28/11/2018 Download 20181122

28/11/2018 All CHUWI tablets with Helio X20, X23, X27(or higher verison) will be updated to Android 9.0 in 2019

14/02/2020 New link to download twrp