[Mojary]

The US tp2's are not sim unlocked for US GSM network. Now if I remember correctly, there were verizon users on here that said their sim was already sim unlocked out of the box. but I stand corrected on that. If not, 2 ways to unlock sim. First is to maybe have your dad call big red to see if they'll give him the unlock code for the sim device. If not...second option, pay to get cmonex's sim unlocker posted in the CDMA upgrades section in this forum.

Once you get sim unlocked...pop in sim, change network to GSM, and you're good to go. Now for data...you'll need to manually input at&t's data settings for it to work.

btw...welcome to the forum!