If you've ever upgraded to a new phone or switched carriers, chances are you're already familiar with the concept of a SIM ...

This could also be useful when traveling out of the country. Some carriers offer better international coverage than others.

Question: I’m heading to the US for two weeks and looking to stay in touch on my open phone. I’m currently on a pay-as-you-go ...

Macworld Why can’t you have three cellular network IDs on your iPhone or iPad active at once–two eSIMs and one SIM or three ...

Sim waste is a massive and growing problem, with local operators producing an estimated 180 million cards annually.