Impress your most tech-savvy friends with these secret smartphone codes they probably don’t know.

Use these codes to forward calls, pay your bill, check balances, etc. Some of the codes work only on certain carriers or devices. One of the codes also might erase your data, so use with caution. I've ...

Here's how to easily access powerful tools, system info, and settings buried deep in your phone. I’m one of PCMag’s mobile writers. That means I check out phones, hotspots, and mobile networks.