downgrade to ICS

[invincible_punk]

Hey I am usnig xperia ion I v updated it to jelly bean bt ma phone is not working properly games are lagging much nd also m unable to make videos properly is there any suggestion?
And suggest me coz I am a noob in this matter

[Uliwooly]

You have 2 options

1) contact your local Sony repair center, they might be able to downgrade your phone 

or 

2) 

How to manually update, downgrade, root 2012 Xperias

http://talk.sonymobile.com/thread/41609