Signing up for Trump Mobile’s wireless service felt a little like engaging in espionage.

On a new phone, I immediately go to Settings > Security > SIM card lock and activate it. Your carrier usually provides a default PIN, but you can (and should) change it to something new. When this is ...

Unencrypted DNS requests can expose your browsing activity, but Android's Private DNS mode helps keep it secure. Here's how to enable it.