This is the ZTE Avid 4G, heading to MetroPCS
The ZTE Avid 4G is coming to MetroPCS
While no specs were included with the tweet, it would appear that the ZTE Avid 4G will offer a 4 inch display, a front-facing camera and a 3.5mm headphone jack. Based on the rendering, it is a good bet that Android 4.0 is installed. MetroPCS customers have until the middle of the next year before losing their independence. Then, it will all be about getting the pre-paid carrier's customers to migrate to T-Mobile.
source: evleaks via SlashPhone