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W550 does not have any support of EDGE, unlike W600, but it comes with a service pair to pair game faciity (similar to Nokia N-Gage the series). Another minor difference between the handset is color, W550 comes in blue, white or orange (W600 is Orange-only).
Moreover, W600i is band of quadruple, W550 is only tri-band GSM 900/1800/1900. Still, the 256Mb of the memory means that it is not a killer of iPod, but the packed up applications make it rather easy to transfer the music starting from CD to the player from music. He looks at completely fresh however, which always will be important for a marked device of “walkmanâ€.
Sony Ericsson W550 will be available in two configurations, W550c for China and W550i for the rest of the world. At the same time, W600a is retitré W600i and will be released in the whole world.