Samsung Convoy SCH-U640 is a very cool cell phone has push-to-talk and mil-spec for Verizon. Its shape look like a military walkie-talkie that Verizon teased it is resistant to shock and dust resistance, vibration, salt fog, humidity, solar radiation, altitude and low and high temperature storage. Its has threaded messaging and its amoung the first PTT devices that offers Field Force Manager, which is a business tool to help you keep track of your employees, while they are on the clock. It is for $49.99 on contract after a $50 mail-in rebate on November 15.