ok so i need someone to clear things up for me..... If I were to buy a 1 generation (2g) iPhone i could easily unlock it and i would be able to use my SIM card from Claro (latin american cellphone company) and it would work perfectly ? if not, what wouldnt work or what may not work? What if i were to buy a 3g iPhone, could i unlock it and use my sim card ? and If i want to unlock it and jailbreak it blah blah blah ....which one would best fit me if i want to use my own sim card ? 3g or 2g? thankss in advance!