Here comes a comparison between latest mobile gadgets Samsung Galaxy S II, Nokia N9 and iPhone 4S.
| Samsung Galaxy S II | Nokia N9 | iPhone 4S | |
 |  |  | |
| OS | Android OS, v2.3 (Gingerbread) | MeeGo 1.2 OS Harmattan | iOS 5 |
| CPU | Dual-core 1.2GHz ARM Cortex-A9 processor, Mali-400MP GPU, Orion chipset | 1GHz Cortex A8 CPU, PowerVR SGX530 GPU, TI OMAP 3630 chipset | 1 GHz dual-core ARM Cortex-A9 processor, PowerVR SGX543MP2 GPU, Apple A5 chipset |
| Screen Features | 4.3 inches, Super AMOLED Plus capacitive touchscreen/16 M colors | 3.9 inches AMOLED capacitive touch screen/ 16M colors | 3.5 inches IPS LED-backlit capacitive touc screen /16M colors |
| Screen Resolution | 480 x 800 pixels | 480 x 854 pixels | 640 x 960 pixels |
| Scratch resistance | Gorilla glass | Gorilla Glass | Scratch-resistant oleophobic surface |
| Other Screen Features | TouchWiz UI v4.0,Gyroscope sensor | Anti-glare polariser,Multi-touch input | |
| Storage | 16 or 32GB internal and 32GB external | 16 or 64 GB internal and 32GB memory external slot (microSD) | 16/32/64GB |
| RAM | 1GB | 1GB | 512mb |
| Main Camera | 8 megapixel camera | 8 Megapixel camera | 8 MP |
| Main Camera Image Quality | 3264×2448 pixels | 3264×2448 pixels | 3264×2448 pixels |
| Camera Flash | LED Flash | Dual LED Flash | Led flash |
| Other camera features | Geo-tagging, touch-focus, image stabilization, face and smile detection | Carl Zeiss optics,Geo-tagging, touch-focus, image stabilization, face and smile detection | Auto focus,touch focus,video stabilization,geo tagging |
| Camera Video Quality | 1080pc/30fps | 720p/30fps | 1080p/30fps |
| Secondary Camera | 2 MP | Yes | VGA/ 30fps |
| GPS | A-GPS | A-GPS | A-GPS |
| WiFi | Wi-Fi 802.11 a/b/g/n, DLNA, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot |
| 3G Internet | HSDPA 20 Mbps, HSUPA 5.76 Mbps | HSDPA,14.2 Mbps; HSUPA, 5.76 Mbps | HSDPA, 14.4 Mbps; HSUPA, 5.8 Mbps |
| EDGE/GPRS Internet | Class 12 | Class 33 | |
| Colors | Black | Black, Cyan, Magenta | Black/White |
| Size | 115.2 x 58.6 x 9.3 mm | 116.5 x 61.2 x 12.1 mm | 115.2 x 58.6 x 9.3 mm |
| Weight | 116 gram | 135 gram | 140gm |
| Battery Talktime | Up to 18 hours 20 minutes (2G) / Up to 8 hours 40 minutes (3G) | Up to 11 hours (2G) / Up to 7 hours (3G) | 14 hours in 2G and 8 hours in 3G |
| Battery Standby time | Up to 710 hours (2G) / Up to 610 hours (3G) | Up to 380 hours (2G) / Up to 450 hours (3G) | 200 hours in 3G and 2G |
