I'm sorry if this has been asked before. I am thinking of buying a no-contract unlocked iPhone from Apple. I currently have a no-contract iPhone 4s on Virgin Mobile (USA). My plan is 30$ for 300 minutes, unlimited text and unlimited data. Since VirginMobile is CDMA, I'm guessing they don't unlock their iPhones or let other SIM cards work on the iPhones issued through them (this is assuming the 4s has the GSM capability). I want a no-contract unlocked iPhone just so I will have the flexiblity of using it overseas since I'm usually making a trip once a year. My questions are: If I buy an unlocked iPhone from Apple (thinking of getting a 5S, 32 GB in white and silver), are there any plans that I can use that are as cheap as VirginMobile's? I have heard that Verizon iPhones come unlocked (although they have to be activated through Verizon, but a T-Mobile sim can be used and so on). Is this true? Are AT&T iPhones the same? Will I be able to keep my current cellphone number from Virgin if I switch to a no-contract iPhone and start using a SIM card? Thanks!