Like most Nextel flip phones, the i670 is relatively bulky at 3.5 by 2 by 10 inches and 4.1 ounces. Granted, that's an improvement over some of the carrier's previous behemoths but it still makes for a tight fit in a pocket. That said, the i670 has sleek lines and it takes its overall shape from the previous Motorola i850. Though the phone is not protected by layers of rubber coating like other phones from the carrier, it does enjoy a solid construction.