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ZTE Open, an early Firefox OS phone

Firefox OS phone dialer

Firefox on Firefox OS

Firefox OS unlock screen on ZTE Open

Back of the ZTE Open

ZTE Open, edge on

Cropping a photo in Firefox OS

Firefox OS gallery app

ZTE Open, top view

BARCELONA, Spain--Chinese phone maker ZTE joined with Mozilla and many mobile network operators to show off the new Firefox OS, an open-source, browser-based smartphone operating system for lower-end smartphones.

Here's an app screen on the ZTE Open with Firefox OS.

Caption by / Photo by Stephen Shankland/CNET
The ZTE Open features a traditional phone dialer, with tabs along the bottom to access recent calls, contacts, and the dial pad.
Caption by / Photo by Stephen Shankland/CNET
Powered by Firefox OS, the ZTE Open naturally includes the Mozilla browser, too.
Caption by / Photo by Stephen Shankland/CNET
The ZTE Open with first stage of the two-stage Firefox OS unlock screen.
Caption by / Photo by Stephen Shankland/CNET
The back of the ZTE Open clearly shows the Firefox OS branding.
Caption by / Photo by Stephen Shankland/CNET
The left side of the ZTE Open Firefox OS phone.
Caption by / Photo by Stephen Shankland/CNET
Firefox OS's gallery app lets you crop photos, apply some basic color filters, and adjust contrast.
Caption by / Photo by Stephen Shankland/CNET
Firefox OS, shown here on the ZTE Open, has a gallery app, but if you want to share photos, you have to do so one at a time by opening it first.
Caption by / Photo by Stephen Shankland/CNET
The top of the ZTE Open shows its power button and headphone jack.
Caption by / Photo by Stephen Shankland/CNET
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