The Samsung Convoy 4 is a rugged flip phone that is designed to withstand tough conditions. It features a 2.4-inch TFT display and is built to military specifications for dust, shock, and water resistance. The phone comes with 512MB of RAM and 256MB of internal storage, which can be expanded up to 32GB via a microSD card. It has a 5-megapixel rear camera for capturing photos and videos. The Convoy 4 runs on Samsung's proprietary operating system and is equipped with a 1,300mAh battery.