Those with a thirst for adventure probably won't be hauling a super-slim regular phone into the mountains. They'll need Swiss Army like features offered by their rugged cousins, such as the Armor 33 ...

The dual-screen Kyocera Echo smartphone for Sprint lets you do two things at once, or look at the world through a 4.7-inch window. But it's only the vanguard of a legion of dual-screen devices that ...

Most phones give you either a single screen or a foldable display that just enlarges one app. The Microsoft Surface Duo was different. It encouraged true multitasking by giving you two distinct ...