We knew the Open C was coming before the start of Mobile World Congress because, well, ZTE spilled the beans on it early. And here at Mozillas press event, were finally getting a first look at the diminutive 4-inch device and the 1.3 build of Firefox OS it runs. But before you judge its modest specs too harshly, bear in mind these FFOS devices are geared towards emerging markets and are priced accordingly.