The different features of Apple iPhone 3g from original iphone is as follows:
Color: Black (8 GB or 16 GB) or white (16 GB)
Size: 4.5 inches (115.5 mm) (h) × 2.4 inches (62.1 mm) (w) × 0.48 inch (12.3 mm) (d)
Weight: 133 g (4.7 oz)
Headphone jack (non-recessed)
Battery has up to 10 hours of 2G talk, 5 hours of 3G talk, 5 (3G) or 6 (Wi-Fi) hours of Internet use, 7 hours of video playback, and up to 24 hours of audio playback, lasting over 300 hours on standby.
Tri band UMTS / …

Manufacturer Apple Inc.
Available Original: June 29, 2007, 3G: July 11, 2008[23]
Screen 480×320 px, 3.5 in (89 mm), color LCD, 3:2 aspect ratio
Camera 2.0 megapixel
Operating system iPhone OS 2.0.2 (Build 5C1)
Input 4 hardware buttons and Multi-touch touchscreen
CPU 620 MHz ARM 1176,[24] underclocked to 412 MHz[25]
GPU: PowerVR MBX Lite 3D[26]
Ringtone iTunes Store via iTunes, custom creation using GarageBand[27] or other tool
Memory 128 MB DRAM[28]
Storage Flash memory 4, 8, or 16 GB
Networks Quad band GSM 850 900 1800 1900 GPRS/EDGE, 3G also includes: Tri band UMTS/HSDPA 850, 1900, 2100, A-GPS[29]
Connectivity Dock connector (with …