Motorola and AT&T have unveiled the Motorola Tundra VA76r rugged clamshell mobile handset with 3G connectivity, with superb navigation capabilities and AT&T’s Push to Talk service. The Motorola Tundra VA76r is GSM/GPRS/EDGE/UMTS/HSDPA 850/900/1800/1900 MHz (GSM/GPRS/EDGE); 850/1900 MHz, meets US 810F Military Specifications for severe temperatures, rain, dust, humidity and dust. The Motorola Tundra also incorporates…