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Key features
- Compact metallic body and extra slim girth (9.9mm) 
- Quad-band GSM support 
- 3G with HSDPA 10.2 Mbps and HSUPA 2 Mbps 
- half-QWERTY keyboard 
- 2.4" 16M-color display of QVGA resolution 
- Symbian OS, S60 UI with FP2 
- 600 MHz ARM 11 CPU and 128 MB RAM 
- Wi-Fi 802.11 b/g, UPnP technology, DLNA support 
- Built-in GPS receiver, A-GPS support, digital compass 
- Accelerometer for screen auto-rotation and turn-to-mute 
- One-touch shortcut keys mean "business" 
- 3 megapixel enhanced fixed focus camera with LED flash 
- Secondary videocall camera 
- 60 MB of internal memory, microSD expansion, ships with a 2GB card 
- microUSB v2.0 
- Standard 3.5mm audio jack 
- Bluetooth v2.0 with A2DP 
- FM radio with RDS 
- Class-leading audio output quality 
- N-Gage gaming support 
- Ovi Maps preinstalled with trial turn-by-turn navigation license (10 x 1 days, to be used within 3 months) and lifetime City Explorer license 
- User-friendly Mode Switch for swapping two homescreen setups 
- Office document editor (with free MS Office 2007 update) 
- Remote lock/wipe over-the-air 
- Comfortable keypad 
- Smart dialing 
- Great battery life 
				Main disadvantages
- Disappointing camera features and performance 
- Video recording maxes out at VGA [at] 15fps 
- No DivX or XviD support (can be installed, possibly requiring a purchase) 
- No TV-out functionality 
- Keyboard takes some time getting used to (not too long though) 
source : http://www.gsmarena.com/nokia_e55-review-396.php