I recently updated my USA Xperia TL to the new 4.3 (.295). I used the central european Bond edition. I didn't have any problems, except for what seemed like unnecessary battery drain throughout the day. I updated to the .199 version (the Belgium version on this site), and my battery life improved during the day. HOWEVER, I have woken up both days since the update with a dead phone, almost missing work. Both nights, there was at least 50% battery left when I went to sleep, and it was dead 7 hours later. The system says that the Android OS was responsible for 54% of the battery drain, but it is much less than that during the day. Is there a setting that needs changed, or is this a problem inherent to the update?
Did you flash US baseband or are you using 3G (HSPA+) only? I'm experiencing the same problem and the only fix for the battery life so far has been a Tasker script to turn off mobile data while the screen is off. It seems to me that Stamina mode doesn't work with our radios.
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