Yesterday I've done the worst mistake, I updated my Xperia ZQ (Brazil) to 4.4. EXTREME keyboard lag, weird bugs, slow notification drawer, screen lag, etc, etc. R.I.P. great phone.
How can I rollback do 4.3?
I've searched about and got really confused. They say I need to flash the 4.3, but to flash I need unlocked bootloader, but to preserve the DRM keys I need to root, but to root I need to unlock the bootloader.
I'm really confused.
My phone currect Build Number is 10.5.A.0.230, NOT rooted, NOT unlocked bootloader.
If someone can explain to me, I will apreciate a lot. If its too much trouble, dont bother gathering links, just give me the some directions, I'm quite lost.
Sorry about the bad english