Your old phone could have been so much more.

Remember pay phones? Those relics of telecom’s distant past were once everywhere—on many busy street corners, in bars and restaurants, even built into airliners’ seatbacks. Now, an engineer in Vermont ...

The phones most of us carry around in our pockets every day hold a surprising amount of computing power. It’s somewhat taken for granted now that we can get broadband in our hands in most places; so ...