I have a Sprint iPhone 4s that I want to send my friend in Amsterdam for her personal use in Europe. As I understand it, simply replacing the sim card in a Sprint phone will not work. The 4s is no longer active on the Sprint network because I upgraded to the 5s. So Sprint will not unlock the 4s for me because it isn't an active device - despite calling and whining and asking to speak to a supervisor. According to them, once the device is not active, they have no way of communicating with the phone. (I think is a load of BS since the phone can clearly receive Sprint service. I could be wrong.) I've looked around at ebay and general Google searches for a work around, but it is all rather confusing! I would like a "real" unlock, not a jailbreak, so that she can update the software without having to worry about it suddenly not working after a software change. But I can't seem to find something that will clearly work. I don't want to pay to ship it, have her pay VAT tax on importing it (a hefty 21%!), only to have it not work in the end. Is there a way to unlock a Sprint iPhone 4s for international use without Sprint? What do you recommend as a workaround?