To 2.3.7

[pain_Madar4]

How can i upgrade my xpria x8 to android 2.3 ?

[Samuel1]

Take a look at XDA, for example this thread:

http://forum.xda-developers.com/showthread.php?t=1362585

Please note that this is not an official update to 2.3.7, as there are none for the X8.

[pain_Madar4]

how can i Unlock my bootloader ??

[Samuel1]

All available information is found here:

http://unlockbootloader.sonymobile.com/