Wrong buddy, you can get a firmware update if you have root but you cant get a firmware update with an unlocked bootloader then you will brick the device.
TA is for bravia engine etc and your DRM Keys !!
Please do some research 1st
Sent From My Z2 On LP 5.0.2 Full Debloated !
---------- Post added at 02:31 PM ---------- Previous post was at 02:24 PM ----------
Since you are talking about the TA backup, I presume that you want to unlock your bootloader.
1) So, IF you have NOT unlocked your bootloader, your DRM and Bravia are Functional.
You CAN update using the sony updater (SUS)... The only thing is you shall LOSE your ROOT once you update ( i am talking about SYSTEM Updates )
2) If you HAVE unlocked your bootloader, kindly DO NOT use the official Sony updater for SYSTEM updates. It will BRICK your device.
I do not know about the exact use of DRM and Bravia, kind of never used them really. So, if your phone is already out of warranty, I highly recommend you unlock the bootloader.
The installation process for most of the ROMs gets way too easy. Plus you get far too many customizations on the kernel.
3) If your BL is Unlocked, Just install a kernel that supports Undervolting . Undervolting and or Underclocking increases the battery Life.
about performance too, you can overclock your device. you can change different handlers (governors/schedulers/profiles) to optimise the battery life. I really haven't actually measured it, but theoretically, it should increase your battery life...People say so.
(I use the Zombie kernel and i like it But please, kindly read up extensively on these 2 topics before starting to fiddle with the voltage and speed values of your phone. First timers also need some balls to play with their own devices :P mine was for 40k (I am a MBBS Student), so i did hitch for sometime before unlocking my Z and fiddling around with a new kernel...
as far as speed is concerned, you remember the notification drop down and the settings menu being a bit laggy in the stock firmware, well, its not so in this ROM, so yeah its in a way faster than the stock. Plus you can Choose what all crappy stock softwares that you want or not want. Improves performance again
Bugs, ermm. None "discovered" as of now by me and I like it just waiting for this guy to upload the LP version....
and 4) as i have said above, if ever, you choose to RESTORE your Trim area, just restore it and flash the latest FTF ( do not exclude anything in Flashtool)
You can use "XperiFirm" to download the most appropriate FTF.
It will become new, out of the factory .
---------- Post added at 05:53 PM ---------- Previous post was at 05:51 PM ----------
yep, use Zombie
Undervolt ur device, use intellidemand
reduce the vibrator strength
switch on the stamina mode ( i need to verify if it works or not :P )
ohh maaaan thanks for this ^^ !!! No thats not my first time to root a xperia device but this seems to be a bit different than on my S,and U ....i wanted to do TA Keys backup but i must first root the device,so what do you recommend to root my device ? a one click root tool or what ? and yes the phone ist fully stock, official .292 firmware 4.4.4 and locked bootloader..