So, I wanted to install Lineage OS on my MI 9T Pro and I've made a mistake (I know why.)

I've use TWRP to access to recovery, I'll erase all folder (system/data/vendors/cache) and I'm trying to install lineage, but my OS folder was in a folder into my zip and an error was occured.

In the panic, I've rebooted the phone, and a message "The system was DESTROYED" appears on my screen, but I've access to Fastboot. I've trying some Fastboot erase (Data/system (no access)/Boot/cache) AND !

I've lock by mistake my phone with a Fastboot oem lock, but I succeeded to unlock it with Mi software.

I'm trying an Fastboot devices, all are okay I've a device connected, but, if I try an adb devices i don't have devices connected.

I have push a miui folder (~90mb) in boot, and now it restarted only in Fastboot mod, no other message, no other possibility. and I've tried a reboot in recovery, nothing, same in "android OS mod", only Fastboot reboot.

I've trying to flash with MiFlash a global rom but error 0xfffffff has occurred.

Today, I'm totally stuck and I don't know what to do, I don't have backup for a potential restoration.

Impossible to have access to debug mod to my Mi 9T Pro because I don't have access to OS and developer mod.

Apparently the battery is charging (always ON) with USB.

If u have some tricks for me, it's with pleasure!

  • 1
    download stock ROM and flash boot.img recovery.img system.img vendor.img from fastboot 'fastboot flash <partition> <file>' and format userdata + cache 'fastboot format:ext4 <partition>' (<file> means full path to image on PC)
    – alecxs
    Commented May 6, 2020 at 16:02
  • @alecxs I've some stock rom on PC but I've only boot.img in zip folder. do u have a link for download all img ? I can't find this files...
    – Mth Lps
    Commented May 6, 2020 at 16:31
  • xiaomifirmwareupdater.com/archive/miui/raphael check for "fastboot" in download description
    – alecxs
    Commented May 6, 2020 at 16:47
  • @alecxs thanks u it's all good now !
    – Mth Lps
    Commented May 6, 2020 at 19:32


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