What to Expect From 5G Phones—and When

The early ones will be expensive, and they may not change the mobile experience. So, should you wait to buy one?

In the coming months, you will be able to buy your first smartphone compatible with faster 5G networks. It will likely come loaded with features like a large screen and souped-up camera.

“Even if you have a 5G phone this year, your chance of actually accessing a 5G network is probably fairly low,” says Mark Hung, an analyst at research firm Gartner Inc.

To understand why, consider that there are two ways to provide 5G coverage—and the phone you choose may not be designed to handle both.

One method delivers 5G signals on the high-frequency end of the spectrum. The upside is extremely high speeds—fast enough, it is often said, to download whole seasons of a TV show in minutes. The downside is that these signals don’t go through walls or other obstructions very well. The other method of delivering coverage—using the lower end of the spectrum—means that signals travel better, but speeds aren’t as fast.

Most carriers will eventually use both methods of delivery, but at this point not all 5G phones will be able to access both—so choosing a phone means deciding which technical trade-off you want to make. (That said, 5G phones will work with existing networks, such as 4G LTE, so you won’t get stuck if there isn’t compatible 5G coverage nearby.)

One big unknown, even among devices that have been unveiled: how long their batteries will last. That may impact their appeal at first, although battery life may improve in subsequent generations as it has for prior models of smartphones.