Phone stuck in Fastboot

[AC Question]

I have a XiaoMi Mi4 and I recently tried rooting my phone with no success. I have never attempted to flash any custom ROMs before.

Recently, my phone would occasionally turn off and reboot into a looped Fastboot Mode, with no way of getting out. Most of the time it resolves itself, but it's happened again and I can't find any answers on the rest of the Internet as to how to fix it.

Any suggestions?

 

[cpu82]

What do you mean by "Most of the time it resolves itself"? Does it boot regularly?

Fortunately, the bootloader of the Mi4 is not locked. So you could flash TWRP recovery via fastboot.
From TWRP you can flash any ROM or SuperSU.zip

If you need further instructions, I can post a short guide here

 

[MovingShadowAndroid]

You may need to use a full recovery tool to bring it back to the beginning. I don't have the phone yet but at least with oneplus devices there is an unbrick tool. That would bring you back to oxygen.