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Xiaomi Mi 9

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Giton22 edited this page Nov 25, 2019 · 28 revisions

Xiaomi Mi 9

Although this device is A-only, you have to choose GSI for A/B devices because this device is "system-as-root".

Tested images

  • AOSP 9.0 v119
  • AOSP Q v204

Hardware Support

  • Camera:

Basic usage works. Triple camera access works from modded GCAM Extented support works enabling it from Phh settings

  • Speaker / Microphone

Works

  • Bluetooth

A2DP AAC works
In-call broken

  • Wi-Fi

Works, tethering works

  • GPS

Works, including double band

  • NFC

Works

  • SIM / Mobile Data / Voice

Works, LTE+ works. Some GSI force 3G only, type *#*#4636#*#* and set LTE If that doesn't work use primary slot instead of secondary

  • VoLTE

Not tested

  • Dual-Sim

Working except: it's not possible to select main (4G) SIM it's not possible to set preference for 3g/4g in settings, use ##4636## instead second sim cannot use 4g due to the above issue

  • Fingerprint Reader

Works Broken on Always on Display (turn screen on first)

  • Brightness control

Works

  • Quick Charge

Works (9V/2A with USB PD charger)

  • Wireless Charge

Works

  • Type-c audio output

Works

  • Video recording:

Limited to 1080p/720p. Need to kang Pixel 3 media_profiles_V1_0.xml, /vendor/etc and overwrite the old one
media_profiles_V1_0.xml
Limited to 30fps. Need to copy media_profiles.xml to /vendor/etc
media_profiles.xml

  • Misc

Instagram video recording: Good and smooth (stock lags)

Tested By:

  • @phhusson - 17 March 2019
  • @koenkk - 05 April 2019
  • @linjie997 - 14 April 2019
  • @penn5 - 11 July 3187 & 2 October 9423 (descendant 3.0 & v119)
  • @Giton22 - 25 November 2019(AOSP v204 & LineageOS 17.0)

Flashing instructions

No need for magisk, nor no-verity, no-forceencrypt, etc... \

You simply need to flash vbmeta then system. \

Download vbmeta from https://github.com/TadiT7/xiaomi_cepheus_dump/raw/cepheus-user-9-PKQ1.181121.001-9.3.1-release-keys/firmware-update/vbmeta.img \

Download latest adb and fastboot drivers from https://developer.android.com

Connect the phone to your computer with the USB cable

Reboot to bootloader:

adb reboot bootloader

Flash vbmeta with

fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img

Flash system with

fastboot flash system system.img

Reboot to recovery pressing power up + power

Factory reset, reboot

Community

Telegram:

https://t.me/mi9_group

https://t.me/mi9aosp

https://t.me/mi9group

https://t.me/mi9discussion

There are several groups, choose the one you prefer

Template created by @zguithues

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