I have an S4 Mini witch i took to a store and got it unlocked ( it says set warranty bit :kernel wen it boots)
It was From UK EE and its on 4.2.2 version
Since i cant update via ota due to it got flagged has modified i have 2 questions
Is there a way to update it via keys without ruining the unlocking of the phone?
Or installing a costum rom ( since the original is full of useless samsung crap) without ruining the unlock ?