A guide to SIM cards, the small chips that connect your phone to a cellular network

A SIM card, or subscriber identity module, is a small card in your cellphone that lets you place phone calls, send text messages, and more.
PC Magazine

Using Two SIM Cards Is Easy and Can Save You Money. Here's How to Do It

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 ...
Houston Chronicle

Does Straight Talk Use SIM Cards?

Pay-as-you-go cell phone provider Straight Talk employs SIM cards, allowing you to use your own unlocked GSM or CDMA phone on the network or purchase one of the phones that the company offers directly ...

I was prepared for an eSIM transfer nightmare, but this carrier changed my mind completely

What's the difference?It's no big deal to pop the SIM card out of one phone and move it over to another as my assignments (or ...
Ars Technica

Swapping SIM cards between phones

Is it possible to swap SIM cards (assuming they're the same size, nano, micro, etc) between phones? The reason is simple: I'd like to see if a particular MVNO (Smart Talk, via TMobile) has any ...
ABC News

SIM Hack Can Expose Cell Phones to Crooks

A German security research lab revealed surprising security flaws in SIM cards. July 22, 2013— -- You're not going to get a text message asking to forward thousands of dollars to fund a Nigerian ...
PC Magazine

Using Two SIM Cards Is Easy and Can Save You Money. Here's How to Do It

Using two SIM cards, or enabling a dual-SIM setup, can be helpful when you need two separate phone plans on a single device. It easily lets you consolidate personal and work numbers on one phone, for ...