After software update the phone is very slow and battery drained very fast

[MMPhyo]

Hi after I updated my phone with latest patch, the phone started to slow doww, battery drained very fast and also sometimes showing network connection error. 

Anyone face this issue and how to solve it? 

[Uliwooly]

@MMPhyo

it'll be wise to repair the phone with XC 

Xperia Companion (XC)

Software Repair Guide

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355