my ambition is to have root without unlocking bootloader. What do I have to do for it?
My current firmware: 10.4.1.B.0.101 Kernel 3.4.0-GE09AFF8.
ZL model: C6503
All current howtos implicate unlocking bootloader, what I dont want to.
I know backup TA, but you can' t do the TA recovery if the phone is bricked. If you send your bricked phone to the repair service and they can unbrick the phone and then check the status of the bootloader then you lose the warranty.
Is it possible to downgrade to a firmware version that don't need unlocking the bootloader whereas getting root, then upgrade to the current firmware with persistent root status?
If yes,which firmware version do I have to downgrade to?
Where do I get this firmware version?
Which tools do I need to porform such a downgrade?