John Locher/AP
Talk about "5G" has been circulating for years now, but it's only recently that the next-generation, super-fast wireless technology has become a real, tangible thing that people can actually use.
Right now, only a tiny number of people across a very limited spread of locations have access to 5G. For most of us, 5G is still a mystery, full of tantalizing promise but few details.
But that's going to change as more carriers and device-makers start rolling out 5G products and service that can deliver blazing internet speeds to your smartphone and to your home. And we're likely to learn a lot more about what 5G technology can do during the Consumer Electronics Show - one of the largest tech conferences in the world - that kicks off in a few days.
Here's everything you need to know about 5G, the wireless technology that will be in the spotlight at CES 2019: