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HOW to hard reset Sony Ericson Xperia
-Turn on your phone.
-On dialer please enter the code: ##7378423##
-On the screen will display menu that you see in the picture
below. Select -> Customization Settings
-Then select -> Reset customization and confirm.
-Wait until the phone reboots. (This may take 3-4 minutes)
SONY XPERIA L factory reset secret code sucess