iPhone 4 vs iPhone 4S

Tech Specs of iPhone4 and iPhone4S

	iPhone4	iPhone4s
Processor	Single core A4 chip	Dual-core A5 chip
Operating System	iOS 4, upgradable to iOS 5	iOS 5
Memory	8GB	16GB 32GB 64GB (new)
Cellular and Wireless	GSM model: UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz); GSM/EDGE (850, 900, 1800, 1900 MHz) CDMA model: CDMA EV-DO Rev. A (800, 1900 MHz)	World Phone UMTS / HSDPA / HSUPA (850, 900, 1900, 2100 Mhz); GSM / EDGE (850, 900, 1800, 1900 Mhz); and CDMA EV-DO Rev A (800, 1900 Mhz)
Wifi	Yes, Wi-Fi 802.11 b/g/n, Wi-Fi hotspot	Yes, Wi-Fi 802.11 b/g/n, Wi-Fi hotspot
Camera	Back: 5 MegaPixels, 2592 x 1944 pixels, autofocus, LED flash, Front: VGA	Back: 8 MegaPixels, 3264x2448 pixels, autofocus, LED flash Front: VGA
Video	720p at 30 fps	1080p at 30 fps and video stabilization
Sensors	Three-axis gyro Accelerometer Proximity sensor Ambient light sensor	Three-axis gyro Accelerometer Proximity sensor Ambient light sensor
Battery Life	Talk time: up to 7 hours on 3G and up to 14 hours on 2G Standby: up to 300 hours Internet: up to 6 hours on 3G, and up to 9 hours on wifi Video: up to 10 hours Audio: up to 40 hours	Talk Time: up to 8 hours on 3G and up to 14 hours on 2G Standby: up to 200 hours Internet: up to 6 hours on 3G, and up to 9 hours on wifi Video: up to 10 hours Audio: up to 40 hours
Size/ Weight	115.2 x 58.6 x 9.3 mm 137 g	115.2 x 58.6 x 9.3 mm 140 g