OK PHONE GOT STOLEN, SO MY BROTHER GAVE ME THIS SGH-I537. GREAT RIGHT! SO I PUT MY GO PHONE SIM IN PHONE & TURNED PHONE ON. WELL THEN THIS LOCK SCREEN CODE POPS UP, SO I CALL MY BROTHER TO FIND OUT CODE AND HE SAYS HE DID'NT HAVE ANY ON IT. I THEN TRIED TO RESET PHONE AND CANT GET PHONE TO DO ANYTHING EXCEPT TRY TO GET ME TO GET WI-FI, BUT SCREEN WON'T ALLOW ME TO SELECT MY CARRIER. LOSING PATIENCE PLEASE HELP.