Pantech isn’t well known in the Windows Mobile world. Their most recent release, the Pantech pn-820, was a no frills phone that went to Verizon.
Well, the BGR thinks that Pantech may be released a dual-slider device much like the Helio Ocean, which would represent a new form factor in the Windows Mobile world.
Not much is known about the C180, but it should be a GSM phone (note the AT&T logo) with UMTS and possibly HSDPA. To see an additional photo, check out the original post at the BGR.