A friend of mine has an really old Blackberry on the AT&T network for personal use. His work gave him a less-old Blackberry (I think the Curve) to keep as they gave him an iPhone for work. He wants to stop using the really old Blackberry and use the less-old Blackberry for his personal use. What does he need to do to get this done? Can he just move his SIM card from old the old blackberry to the less-old? Does he need to call AT&T with the EMEI number of the less-old blackberry to activate it on that network? Thank you.