I hope I'm posting this in the right place. If not, attack as much as you wish. I just unlocked my U.S. iPhone 3G, and it works. I tested it with an American T-Mobile SIM and an Italian TIM SIM. I can make and receive calls on both networks. My main issue is that I will be in the UK for about five months starting this Sunday and I want to use my phone there and still have internet access (with voice and text services also). Are there any stores I can just walk into, purchase a Pay & Go SIM, and be on my way? Will O2's Simplicity SIM work with my unlocked phone? Are there better, cheaper services? I'm just looking for the most hassle-free solution. Thanks!