Activate your iPhone back to AT&T if the SIM card you insert after you install blackra1n onto the device doesn't work properly. Blackra1n is a third-party program that "jailbreaks" SIM-bearing iPhones ...

A few years ago, the absence of dual SIM in iPhone was listed as a major shortcoming by numerous smartphone users. It’s normal for most smartphone owners to have a couple of SIM cards to keep their ...

What is a SIM card used for? A SIM card, or a subscriber identity module/subscriber identification module, is a tiny memory card that contains unique information and is linked to a particular network ...

You generally can't use an Apple iPhone on a cell network if it's never been activated with such a network, although once it is activated you can remove your SIM card or simply never connect to the ...

We previously reported that a tiny handful of iPhones shipped without SIM cards, while significantly more units have generated the error message "No SIM card ...

We purchased an iPhone 8GB today (after waiting in line at the local AT&T store for about 8 hours), only to find that once home and opened, the device lacked a SIM card. iTunes and the phone both ...