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You can boot on safe mode and see if you experience the same issue
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008
guyzz please has any one solved this issue i have the same issue here right half of screen not responding well ....any solution its a new device !!!
Hi, if it's a new phone take it back/contact where you bought it from.....failing that it probably is best to contact your local Xperia Care Centre but i would try your place of purchase first
Good luck :smileysmileywink: