So my uncle is moving to mexico and he wants me to unlock his iPhone 3G 4.2.1 8 Gigs. So how do i do this. And if possible can i unlock a iPad 2 3G. But the iPhone is a priority. His badeband or Modem Firmware is 05.15.04 Also he already has a AT&T sim card but he won't use it anymore. So should I take the card out?