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Lenovo Smart Tab M8

Riccardo Boninsegna edited this page May 12, 2021 · 3 revisions

Lenovo Smart Tab M8

TB-8505XS "With Google Assistant and SmartDock"

Not to be confused with Lenovo Smart Tab M8 FHD although the same installation procedure applies

A-only, but takes A/B roms due to system-as-root

Full 64 bit armv8

Steps to install

  • Recommended: Download the stock ROM, using for example the official tool (registration required); in which case it will be stored in \ProgramData\LMSA\Download\RomFiles\\*\.
  • Unlock the bootloader:
    # after enabling unlocking in developer settings...
    fastboot flashing unlock
    # press volume+
    
  • flash this image with the fastboot utility:
    fastboot flash --disable-verification --disable-verity vbmeta RomFiles\TB_8505XS_S300088_201220_BMP\vbmeta.img
    fastboot flash system system-roar-arm64-ab-vanilla.img
    fastboot erase userdata
    fastboot reboot
    

Hardware support

PHH AOSP 11.0 v300.m:

⚠️ Will bootloop if secure boot (enabled by agreeing to it while configuring a protected lockscreen) is not enabled

Component Comment
MicroSD Working
WiFi Working (802.11ac 5GHz)
Bluetooth Working (search, OBEX)
Camera Working (AOSP camera, photo & video)
Speakers Working
Mic Working (stereo sound unverified)
SIM / Mobile Data / Voice Untested (IMEI detected)
VoLTE Untested (is it even supported?)
Wired headphones Working
Wired remote/mic Untested
ADB Working
MTP Working
OTG Working
Dock + OTG Working
Offline Charging Broken (freezes on unlocked bootloader warning)
Root Working (PHH Superuser)
First boot < 3 minutes

PHH AOSP 11.0 v306:

as above


Tested By: Ryccardo (@rboninsegna) - TB-8505XS ZA5D0038SE (Swedish model sold in Italy), official firmware TB_8505XS_S300088_201220_BMP - 2021.5.12

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