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.

Business travel means traveling to foreign countries that work far different from the US. Having cheap internet access can make a lot of things, from navigating a new city to sending emails, a lot ...

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

We independently review everything we recommend. We may get paid to link out to retailer sites, and when you buy through our links, we may earn a commission. Learn more› By Ryan Whitwam Most people ...

If your new phone no longer supports SIM cards, or you don't want to use them anymore, you can convert to eSIM instead.

Quite a few phones worldwide support the simultaneous use of two physical SIM cards, but not many US models do. In fact, most otherwise dual-SIM-capable phones see the feature disabled in the US ...

Millions of mobile phones may be vulnerable to spying due to the use of outdated, 1970s-era cryptography, according to new research due to be presented at the Black Hat security conference. Karsten ...