Facundo Holzmeister on Twitter: "The new OTA OxygenOS 11.2.6.6 update caused my brothers OnePlus 9 to boot loop. Pretty much bricking the phone. Error message: init_user0_failed Not good. Be careful if you
How to fix your OnePlus phone that's started bootlooping after installing its latest update
PROBLEM!!! TOTALLY BOOTLOOP
Bootloop while upgrading to open beta.
Android 12 beta gets OnePlus devices stuck in a bootloop - PhoneArena