SIM cards have become a universal aspect of modern smartphone usage, but the technology and meaning behind the name dates ...

These two ways of connecting your phone to a cellular network are very different. We tell you about each and how you can switch from one to another.

I’ve been asked for my iPhone’s SIM number. How do I find it? How to find the SIM number on your iPhone: What is a SIM number? Your iPhone’s SIM number is technically called the ICCID, which stands ...

Find out how to trim your own micro-SIM card for use in phones that require this new format. Sharon Profis Former Vice President of Content, CNET Studios As vice president of CNET Studios, Sharon led ...