THIS IS MY SECOND TIME I PUT THIS QUESTION ,FIRST I GOT AN ANSWER FROM SONY XPERIA SUPPORT ,BUT LOOKS LIKE THEY DIDN'T KNEW ALL THE DETAILS (I SAID THEN THAT THE PHONE STOPPED RESPONDING AFTER AN APPLICATION INSTALLATION FAILURE ,APPEARS ,ON A LIGHTED SCREEN, 'SONY ERICSSON' AFTER THAT IT BLOCKS ) WELL WHAT THEY PROBABLY DIDN'T KNEW IS THAT AFTER LIGHTING THE SCREEN I CAN'T ENTER THE MENU TO ACCES IT ,NEITHER THE PC COMPANION CAN DETECT THE PHONE,(DOESN'T APPEAR-SEARCHING PHONE AS IT SHOULD) SO I ASK AGAIN, IF YOU DON'T MIND,HOW CAN I FORMAT THE PHONE TO THE FACTORY SETTINGS ,OR WHAT ELSE CAN I DO? THANK YOU .HAVE A GOOD DAY !