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I'm hold power button and volume up but can not be
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008
this is safe mode.I want recevery mode
Have you rooted your phone?
http://talk.sonymobile.com/t5/Xperia-U/recovery-mode/m-p/261939/highlight/true#M14571