You can check to see if your iPhone is unlocked from a carrier using any of a few different methods.

If you need to find out your iPhone's carrier without a SIM card installed, you can do so through the Settings app.

Once you’ve activated your iPhone with your carrier, it should continue to work on the cellular network without any problems as long as you’re within range of a tower. Nevertheless, the vagaries of ...

Sareena was a senior editor for CNET covering the mobile beat, including device reviews. She is a seasoned multimedia journalist with more than a decade's worth of experience producing stories for ...

Have you found yourself unable to send or receive messages on your iPhone? Or are iMessages being sent from your email ...

You're probably already familiar with the SIM card, a tiny chip in your phone that connects it to your cell phone carrier of choice. For years, this chip was on a physical card that you could swap in ...

If you've just got your hands on a shiny new Sim card, congratulations. Switching your Sim (the chip that dictates your allowance) can unlock huge savings. Now comes the crucial step of activating it ...

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 on its support site.

The physical SIM cards we've used for decades are slowly being phased out. With the Pixel 10 series, Google's phones have gone eSIM-only for the first time—at least if you buy them in the US. Apple ...