Hi guys, I own an Xperia ZR C5502 too and recently unlocked my bootloader without knowing that my DRM keys and BE2 will be lost. Plus when I read the website with tutorial telling me to backup my TA I thought it was the ROM it was talking about and I didn't care. So now is there any way I can restore the TA partition. Can I use someone else's backup of the TA partition? Will that work? If yes, can someone please upload or send their TA partition backup to me.
PS - Thanks for the C5502 10.3.1.A.2.67 .ftf file. Really appreciate it
You can give a try by following the procedure on Sony's site for unlocking bootloader..by that you can atleast get the unlock key to your email, then you can relock the bootloader via flash tool