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Boot on safe mode and try again (while on safe mode)
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008
Are you using the preloaded messaging app or a third party app? Xperia keyboard or a different keyboard?
Boot on safe mode and try again (while on safe mode)
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008
Just restart your phone and the apps will be there, and the problem too, the reason is that an app its acting up, which app? it has to be an app that you downloaded at some point. There's no way to tell. You will have to unistall one by one until you find the culprit
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