When your phone rings and the caller ID is blocked, or it's an unknown caller, it can be pretty frustrating. Especially when you receive repeat unknown calls. If you're ready to stop those annoying ...

Caller ID is standard now, but it wasn't always. When widespread adoption started in the 1990s, it was controversial to the point that it was widely viewed as an invasion of privacy. For people with ...

Everyone has caller ID these days, but sometimes you want to block your phone number when you make a call. Fortunately, blocking your phone number is pretty easy to do - simply follow these steps for ...

Phone numbers stink for security and authentication. They stink because most of us have so much invested in these digits that they’ve become de facto identities. At the same time, when you lose ...

Your phone displays "No Caller ID" whenever the caller has chosen to hide their phone number from your screen. This differs from "Unknown Caller" or "Private Number," which typically point to ...

More than half the smartphone apps tested by The Wall Street Journal sent a serial-number-like identifier for the phone to tracking companies. Some tracking companies use these IDs to create profiles ...