What with the anti-rollback features? Why suddenly implement this?
Will affect older phone?
Sent from Xiaomi REDMI NOTE 3 using GAGT
it's a google security feature
every time they update the rom (and the android version), there will be some security patches. security vulnerabilities get discovered all the time, and they always patch with newer roms.
of course, the longer time a vulnerability is known, the more time the hacking community has to develop exploits and circulate methods / programs to abuse it.
google's point is to prevent phone thieves, if they are trying to get into your phone's system to get your locked information, from simply flashing to an older rom with an old and known vulnerability they're looking for and exploit it to hack into your phone. this is too easy for them.
it's something implemented by google in android oreo. xiaomi just got pulled along for the ride.
although other androids have methods of disabling anti rollback. xiaomi hasn't implemented this yet.