I just bought an UNLOCKED iPhone 4S from the Apple store. I will be traveling to Mexico in a week. Anyone knows how I can get a Mexican SIMs card IN the US? I was hoping to buy one here in the States and when I arrive in Mexico the phone will be ready to use in with a Mexican phone number, Data package and minutes. Or anyone else has other suggestions, comments, tips, etc. etc.? Thanks all, greatly appreciate your help.