It looks like Pantech and AT&T are working on the successor to the Duo C810 smartphone. The new Duo 2 C820 model is said to feature a rounded black case, similar to Motorola MPx200 and the same dual sliding mechanism as its predecessor with both numeric and QWERTY keypads.

It appeared at the FCC this week. Apparently this is not a smartphone, as it will be much cheaper than the C810. Unfortunately, besides this crappy photo we have almost no info about the device at the moment; just note that it is a red 3G clamshell. The Pantech C610 is most likely headed for AT&T, but it’s too soon to tell. The new clamshell has 3G and is red in color.

FCC has posted a picture of an upcoming UTStarcom TXT8010 smartphone from Pantech codenamed Elvis. It looks pretty fat, and apparently has a landscape screen and a QWERTY-keyboard. In rest, specifications are mid-end and include: