Cellphones

Check your bill. "Cramming" goes back decades -- and costs billions.

New York City has about 10,000 public payphones. But who's using them?

Thanksgiving is over, but let's give a moment of thanks for the U.S. Department of Transportation.

If police want to track your movements using old calls you made on your cellphone, they can get the information from your cellphone company without a warrant.

Nearly half a billion mobile phone SIM cards might be vunerable to hacking. The vulnerability was revealed by a security researcher in Germany.

It's happened to all of us. Your phone loses its charge in that one place you can't plug it in. Now, New York City is about to get solar chargers in many of those places.