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From Wikipedia:
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A 3G handset by Nokia, running Symbian operating system, with Series 60 version 2 user interface, the Nokia 6680, features Bluetooth, a 1.3 megapixel fixed focus camera, front VGA (0.3 megapixel) video call camera, hot swappable Dual Voltage Reduced Size MMC (DV-RS-MMC) memory expansion card support, stereo audio playback and a 2.1", 176x208, 18-bit (262,144) color display. Announced in February 2005, they reached the market in May 2005. |
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The Nokia 6630 is a 3G smartphone made by Nokia, using the Series 60 platform with the Symbian operating system, released in November 2004. It is an evolution of the 6600 and 6620 smartphones, supporting tri-band GSM (900, 1800, 1900 MHz) and W-CDMA (2100 MHz) mobile networks (Nokia's third W-CDMA phone after the prototype Nokia 6650 and the test type Nokia 7600). It also supports EDGE packet data connections. It is also an evolution of the 7610 and 6670 which run on lower operating systems, when 6630 was released it made these phones look like cheap cousins and evidently reduced the demand for both models.
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6630 vs 310, 
