Some owners of Apple's new iPhone 4S have been hit with SIM card error messages, even if they are connected to a CDMA carrier that does not use SIM cards. One reader ...

While Sprint’s initial batch of iPhone 4S handsets were sold unlocked, allowing you to swap out your Sprint SIM card for a SIM card of your choice, that will no longer be the case. From today, ...

You’ve just bought yourself an iPhone – welcome to the club! However, while you thought you’d just be able to pop your existing SIM card into your iPhone, you might be wrong. That’s dependant on not ...

In a first for US wireless carriers, Sprint and Verizon Wireless will allow iPhone 4S customers to unlock their mirco-SIM card slots, which enables use on wireless networks around the world, reports ...

If you plan to line up all night at the Apple Store to be one of the first to get the iPhone 4S on Friday, or are hoping to snag one at a small Sprint outlet that no one knows about: We’ve got you ...