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Please read this if you considering unlocking the boot loader or rooting your phone.
Please note that you may void the warranty of your phone and/or any warranty from your operator if you unlock the boot loader. You should only unlock the boot loader of your phone if you are an advanced user with good knowledge of the technology and risks involved.
For more information go here http://unlockbootloader.sonymobile.com/
Please also note
The Sony Xperia support team will not be able provide any support, related to unlocking the boot loader or rooting your phone.
We also recommend you to read the below blogposts.
Sony Xperia support team
2013-02-02 08:21 AM
Looking for solution everywhere - XDA, etc no where to find solution for Unlocking:
Phone Software Version - 1250-5829_4.1.B.0587 GENERIC - user
File System Version:
S1 Boot Version:
ETS Software Version:
Network - 0
Network Subset - 0
Service Provider - 0
Corporate - 0
SIM - 0
Bootloader unlock allowed: No
Anyone hav solution to unlock allowed - YES & Root
2013-02-02 08:58 AM
You can't unlock the bootloader, however if you want to root your phone
You can do it without unlocking the bootloader
2013-02-15 04:17 PM
Rooting ICS 4.0.4:
Success - Follow your guide
Downgrade to GB 2.3.4:
Success - Using Flashtool
Root - Too difficult to follow/a lot of broken link
Prefer 2.3.4 smoother than ICS & will wait if any stable release on ICS.