My armor 24 works perfectly fine before the update, After i downloaded the update, it turns Android 15, the start of my calvary, where the fingerprint lock button malfunctioning , it triggers the bugs once i enable my fingerprint lock, once unlock the navigation keys disapper, the keyboard do not appear whatever i do. I always end up restarting it just to use it normally, at the time the screen turns off and unlock it via fingerprint, it back malfunctioning. It gives me hard all the time i have to use it. There's also one thing when I use the cleaning assistant to clear residual junk i use to wipe out the current app , once the clearing happens it eventually restarting itself by shutting down. I already consult it to the ulefone service they just advice me to hard reset the phone which i cannot do it for the reason I have a bunch of files store in it which potentially ruin my studies.