We came across a photo of the dual SIM phone by Samsung that leaked online. The new dual SIM phone seems to be a successor of the D880 DuoS and is being named Samsung B5702.
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Some sources are guessing the B5702 will have a 256K color QVGA display, but not yet confirmed. There also seem to be some clever info LED system above the display to let you know which SIM card you are currently using.
source techblog.gr