Mobile.Burn review of the Mobicom 6688, a dimunitive clamshell cellphone from a relatively little known Chinese manufacturer that’s hoping to crack the North American market. Besides being small (just 68mm long, though it is a bit thick) and light (about 72 grams), the dual-band GSM/GPRS 6688 has a 64,000 color main screen, a monochromatic external display, and a 5-way directional controller.