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 ...

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 ...

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 ...

eSIMs are catching on with carriers, even budget-minded providers like Cricket Wireless. Assuming you’ve got a compatible phone, here’s how to activate a Cricket eSIM, transfer one to a new phone, or ...

Owners of cellular iPads are no longer able to use a supplied Apple SIM to activate a data plan for their tablet, forcing users to either use a different physical SIM or move to eSIM. Apple included ...

If you’re already a Spectrum TV or internet customer, it might make sense to put your smartphone on Spectrum Mobile. This is especially true nowadays as the company recently upgraded its strategy.

During Apple's recent iPad media event, the company was quick to glance over a feature that could have massive implications on the wireless industry. Those who purchase a cellular version of the iPad ...