plz.. help to unlock my nokia 6680 vodafone it can only read 3g sim but im now in pakistan and 1 want to run my ufone sim but when i insert my ufone sim it say's the sim card not valid my imei no is 357062002834272 and item: 0042744 .please help me all funtion's work without sim cars but most important funtion is sim they can not read pakistani sim's. thanx in advance