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 ...

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 ...

Due to in-family upgrades I have an iPhone 5S that no one needs. I'd like to keep it for development purposes, but I don't want to keep track of yet another Apple ID and I don't want to put a sim card ...

Find My iPhone app in the news. Photo: Jim Merithew/Cult of Mac The recently revealed exploit that allows anyone to bypass the iPhone’s Activation Lock system is a rather simple process that requires ...