Can anyone please help me. I've got an O2 Uk originating 7650 bought brand new and an O2 U.K sim card. I put a code request on so that when the sim card is changed in the phone a code is asked for. My friend put their sim in and I unlocked the phone using the code so they could make a call, and when I went to put my sim back in it says code error when I put the code in. Any other code i.e. the standard 12345 the screen just goes blank. It seems like the phone has screwed up.
Is there anyone who can suggest a solution i.e. a remote code or a cable and software solution?