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 ...

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 ...

Tired of swapping SIM cards every time you land? It might be time to switch to an eSIM, the modern travellers best-kept secret. Activating a Vodafone Idea (Vi) SIM is a straightforward process, ...

The newer eSIM technology, which is quickly becoming the standard on high-end phones, is safer and more convenient.

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 ...