The Samsung Z400 is a push-to-talk phone recently released with Sprint.  It is surrounded by a rubber coating to help reduce scratching and improve the grip. The Samsung Z400 measures 3.7 by 1.9 by 0.96 inches and weighs in at 3.5 ounces.

The Samsung Z400 is a military-grade - durable phone, which had to pass rigorous test to receive this title. These test included specs for resistance to dust, shock and vibration making it sufficient for military use.

With its rugged casing, OLED external display, dual-antenna setup, stereo speakers, Bluetooth Wireless technology, EVDO, a 1.3-megapixal camera, and a GPS navigation enabled with live search, setting the Samsung Z400 apart from other typical push-to-talk phones.

The Samsung Z400 is now available in select Sprint markets for $150 with a two-year contract. A $50 mail-in rebate is available when signing up for a qualifying plan.