Some gadgets become worthless with time, while others, like these devices, only become more coveted and expensive ...

Your old cell phones could be worth a good amount of money, especially if they were part of a groundbreaking generation or are rare.

A kindergarten teacher shares how she got a 'tattle phone' for her learners and then listens to all the things they complain ...

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access ...