A SIM (Subscriber Identity Module) is a tiny bit of circuitry that uniquely identifies your cellular modem in a phone, tablet, or other device to nearby cellular networks to allow access for voice, ...

Buried in the latest iOS 12 beta is evidence that Apple is going to release the first iPhone that can have two SIM cards installed at once. But most people won’t have the option to buy this device.

A dual-SIM setup lets you use one phone to make and receive calls and texts from two numbers. It's also super convenient and can save you serious cash when traveling. We show you how to use two SIMs ...

When iPhone Dual SIM support appears in iOS 12.1, it will be possible to use two service plans at once with Apple's latest models. Photo: Ed Hardy/Cult of Mac A hotly anticipated feature wasn’t ...