In another step toward the mainstream for jailbreaking, T-Mobile has just announced that it will offer free micro sim cards to network subscribers using unlocked iPhone 4s. The latest iPhone cannot ...

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 ...

T-Mobile now offers micro-SIM cards for subscribers with unlocked iPhone 4 smartphones who want to use its network. The SIMs are listed at $9.99 but … ...

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 ...

Apple wants the SIM card of the future to be smaller – even than the micro-SIM cards used in the iPhone 4 and iPad – to enable the creation of thinner mobile devices. Reuters reports that an executive ...