All iPhones and iPads with cellular have a slot on their sides that houses the Subscriber Identity Module (SIM) card provided by your mobile carrier. The SIM card enables your device to access the ...

Switching carriers or using a different SIM card on your iPhone doesn’t have to be complicated. If your device is SIM-locked, ...

Seeing “No SIM” or “Invalid SIM” on iPhone? Check your SIM card, restart, or update your carrier settings. Simple fixes often ...

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

iPhone SE has sent ripples across the mid-range segment with its combination of a killer $399 asking price and capable hardware. The interest in Apple’s latest offering is sky high, and people are ...

If you’ve bought an iPad with 4G/cellular capabilities (we discuss whether that’s a good idea in our 2015 iPad buying guide) or a new iPhone, you need to buy and install a SIM card. Here, we explain ...