ZTE Open is the first official Firefox OS phone (hands-on)
The ZTE Open is the first phone we've seen running Firefox OS other than a few developer units, and just as we figured it's an extremely low-end device. It's very small, and feels pretty good to hold, but we immediately noticed its washed-out screen. Details are scarce for the moment, but we've heard rumblings that the Open is running a Cortex A5 processor, has a 3.5-inch HVGA touchscreen display, and is reminiscent of Android phones from several years ago.
Lag is a major concern — apps took multiple seconds to load, to change toggles, and to make UI transitions, though at least some of the performance issues could probably be attributed to the poor cellular and Wi-Fi connectivity we've got in the venue.
Bottom line, there are no needles being moved here from a hardware perspective — it's really just a question of whether consumers are finally ready for the web-based app stores that their carriers are trying to push on them. (Source