I posted this question over at XDA forum but I hope someone here may be able to help.
I recently went on vacation and left my Xperia XA F3111 at home. Someone had access to it for over 2 weeks and installed some spyware on it.
When I found out I factory reset the phone but I am worried he may have flashed the phone with a malware-infested ROM which will survive a reset. He had access to the phone for a long time and I am sure he knows someone who knows how to hack phones.
My phone settings say "Bootloader unlock allowed = No" which I believe (rightly or wrongly) means he could not root the phone or install a custom ROM?
Anyway, I am hoping someone can tell me if there was any way he could have bypassed this setting, unlocked the bootloader, flashed an infested ROM and re-locked the bootloader?
If this is possible, is there a guide that would help me do the same thing and re-flash the phone with a clean stock Sony ROM?
It's a nice phone, but at the moment I can't take the risk that it has been poisoned so it may well be heading for the recycle bin.