If you haven't already, you need to try a flip phone. I don't mean one of those old junk dumbphones, I mean something like ...

Star Trek fans know well how ... works with any Bluetooth enabled phone and allows seamless phone calls. It also works as a wireless speaker — the communicator in the show didn't even do that.

Although the first mobile phones resembled a brick and weighed 40 kilograms, no one could have predicted that in the next 70 ...