Here's review from GSMArena about Sony Ericsson W880, This phone just 9.4mm thick, the W880 manages to pack a 2.0-megapixel camera, M2 card slot (1GB included), and Bluetooth 2.0 support.
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also see :
sony ericsson so903itv review
sony ericsson w610i review
sony ericsson w51s review