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To soft reset an Xperia SP you have to remove the back cover of the phone. Then press the 'OFF' button with a tip of a pen (or something similar) for about 5 seconds.
The back side button to Hard reset isn't working either. The better solution is to remove the SIM Card and the touch screen will work (Incase touchscreen wasn't responding before) and then insert the screen and use Power off button & select the Power off option on the Display screen. Hope this helps.
hey buddy finally igot the solution
for hard reset...there is a different trick for reset...
1..open the back cover
2atthe bottom u see OFF ...
3 with match stick u have to hold down the hiden button
Xperia SP comes with a non removable battery.So turning off in this condition is not possible by removing battery.The volume up+power button doesnt work in Xperia SP unlike other phones.The solution is given below.
P.S. Don’t use very sharp objects as it may damage the OFF Button.
After restarting we found that our Xperia SP got back to normal temperature and everything was fine. We were able to charge our Xperia SP again, device was cool.
I also faced the same issue and got solved with the solution given above.Hope it will work for you also
Saludos amigos , mi problema es que despues de instalar una app "audio beats" se reinicio el telefono y como veia que no era lo que buscaba lo desinstale y se reinicio aparece el logo de sony llega hasta la pantalla de inicio y de ahy se vuelve a reiniciar y ha entrado en un bucle de reinicio de nunca acabar, por favor necesito una ayuda de como volver a usar el telefono
zulhamizan,doing this hard reset will NOT erase any of your data.It just reboot your phone.Yes,it can be used to solved hang issues.Mainly,it was used to free memory(RAM) used from RAM-hungry apps.
so doing this often wii cause any problem to ths phone??