before update 4.2.2

[KamalSoni]

What kind of precautions i should take before updating to 4.2.2 ?

[discretion1]

You may take a look at these threads.

http://talk.sonymobile.com/t5/Xperia-mini-pro/Backing-up-data-before-updating-software/m-p/130402#M5...

http://talk.sonymobile.com/t5/Xperia-Ion/Alternatives-on-How-to-backup-Xperias/td-p/161240