My friend recently purchased a Sony xperia x3. Actually he updated his phone from SEUS update site. He has first download a CAB from Sony Ericson and install that CAB on his phone memory card after that he go on to update in SEUS. But he is facing some problem after update. I think that this correct way for update and also if he format his memory card before update. I think he doesnít update correctly thatís why his phone has issue. And also I want to know before upgrading it had already in MR1 but after upgrading it will require new MR1. I updated his phone myself Please give me right information.