You can activate a new or used iPhone for use with a cellular service provider in a few steps. Here's how to activate any iPhone, or troubleshoot it.

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 ...

Apple removed the physical SIM slot for the iPhone 14, 15, and 16 in the US. If you're travelling out of the country or need a separate work line, here’s how to get connected using an eSIM. Lance is ...

Learn how to activate eSIM on your iPhone with this easy guide. Discover compatibility, setup methods, and tips for seamless ...

Apple says the issue may stem from having an inactive SIM with the same number as your active SIM. To fix it, remove the ...

iPhone users on iOS 26, iMessage activation may be blocked by an inactive SIM — here's how to fix it. Some users are finding ...

If you're having trouble getting iMessage to work after upgrading to iOS 26, Apple is aware of the issue and has shared a fix ...

Here's how to fix iOS 26 iMessage activation bug on phone number, with the fix coming straight from Apple in official ...

Verizon now makes it possible for customers to defend against SIM swapping attacks by enabling the free Number Lock protection feature through the My Verizon app or the My Verizon website. SIM ...