The iPhone 3G was introduced by Apple in the year 2008 with more features and capabilities compared to its predecessor. All these smartphones are second and third generation iPhones.

1. The iPhone 3G features a touchscreen which has a diagonal 3.5-inch widescreen display and a resolution of 480 pixels by 320 pixels. It also has a 2.0-megapixel camera with photo geotagging and another feature that can be used to tap the screen to focus.

2. Battery for the iPhone 3G is built-in with a rechargeable lithium-ion technology which is capable of 300 hours of standby time along with 5 hours of talk time. In the 2G network, iPhone 3G provides 10 hours of talk time and it can also sustain 7 hours of video playback.

3. The iPhone 3G has a height of 4.5 inches, a width of 2.4 inches and a depth of 0.48 inches. It also weighs about 4.7 ounces.

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