If you are an iPhone owner and plan on making a trip over to the United Kingdom, you may be wondering if the phone is going to work, and if not, what you need to do to use the phone. Luckily, all iPhones bought in the United States (and all phones provided by AT&T) use the GSM wireless service. This is a signal type used generally throughout the rest of the world, including the UK. Mobile phones from companies such as Verizon and Sprint, though, are not going to work because they use the CDMA service. Writer Bio
