Apparently Samsung has a new dual SIM mobile phone called the Samsung B5702 and is a slider form factor and is probably the successor to the Samsung D880 dual SIM handset.
Sec wise there isn’t a great deal known on the Samsung B5702, but at a guess and one that’s not confirmed in anyway we’d say it probably has a 256k QVGA display, and we think the LED’s above the screen denote which SIM is being used.
Like I said that’s just our guess, but Samsung will probably launch the B5702 at the Mobile World Congress 2009 so expect more detail to hit the net waves then.
Source — GSMarena