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Upgrading, Modifying and Unlocking

Some of the more advanced issues, involving multiple phones.

Hard Reset Sony Xperia U st25i


Hi.  I'm in agony, I have forgotten my code to unlock my Xperia U (ST25i), and I think the only way is to hard reset/reboot the device. Although i can't find out anywhere how to do it (tried many button combinations).  Greatful for your assistance.    -B


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