Inspired by water, HTC wanted to make phones that felt liquid and deep.
The U Ultra, left, is larger than the U Play.
The reflective phones capture and scatter light in four colors: white, pink, blue and black.
Here's another look.
The quality of light changes the phones' color.
But it's the phones' second screen at the top and AI software inside that sets the U Ultra and U Play apart.
You can see subtle reminders, like to get the milk.
And you swipe among screens as a shortcut to your top apps.
The weather alert.
Here's what a calendar notification looks like.
You'll do some settings setup to get started.
You can choose everything from the music player to the weather, but I have a feeling that less is more.
The phones run on Android 7.0.
The Play has stepped down specs -- for example, its 16-megapixel camera isn't going to be as sharp as the Ultra's 12-"Ultrapixel" shooter, HTC said.
You'll be able to see the U Ultra and U Play from even more angles in the next slides, including how reflective and smudgy the phone gets.