BlackBerry 7750 OS: BlackBerry; Dimensions: 4.76 x 3.03 x 0.71 inches (121 x 77 x 18 mm); Weight: 5.00 oz (142 g)the average is 4.8 oz (137 g); Design features: Full keyboard; Resolution: 240 x 240 pixels; Technology: LCD; Colors: 65 536; System memory: 2 MB ...