If you can't make a call or if you see an error message that your phone's SIM card is not working, there are several ways to troubleshoot the problem.

But while Japan’s infrastructure is famously efficient, staying digitally connected as a foreign traveler can still be a ...

You can remove the SIM card from your Samsung Galaxy S10 using the SIM removal tool that came with your phone, or a very thin paperclip.

No one likes dropping offline, especially if you need to stay in contact. Get expert tips for boosting your cellphone signal on iPhone or Android.

A good UHS-I card is quick enough for most people’s needs, and the Lexar Professional Silver Plus is the best value of the ones we’ve tested. Paired with Lexar’s USB card reader, it consistently ...