Usually Pantech phones with a "C" prefix in their model number are bound for AT&T, so we guess the new C610 won't be an exception.
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 release date is also unknown, and we wouldn't expect the C610 to hit the stores anytime soon.