The iPhone 4 is actually 0.1 ounces (4 grams) heavier than the 3G, which makes sense since it has more glass, less plastic, and the steel band. iPhone 4 Weight

The iPhone 4 is actually 0.1 ounces (4 grams) heavier than the 3G, which makes sense since it has more glass, less plastic, and the steel band. iPhone 4 Weight: 4.8 ounces (137 grams) iPhone 3GS Weight: 4.8 ounces (135 grams) iPhone 3G Weight: 4.7 ounces (133 grams) Sources: http://www.apple.com/iphone/specs.html http://www.apple.com/iphone/specs.html http://www.apple.com/iphone/iphone-3gs/specs.html http://www.apple.com/iphone/iphone-3gs/specs.html http://support.apple.com/kb/sp495 http://support.apple.com/kb/sp495