Documents seen on the FCC site today revealed details about the Pantech C810 Mustang. The C810 is a quad-band GSM/EDGE, dual-band WCDMA slider with Bluetooth. Though the user manual does not match the phone, other photos in the filing show a 1.3 megapixel camera and keys for Windows Mobile Standard (Smartphone). Some pictures in the document appear to show the C810 is a dual-slide phone similar to the Helio Ocean, also manufactured by Pantech, however there are no pictures of C810 open to a QWERTY keyboard. No carriers have announced this phone, but it is compatible with AT&T’s network.