Sandisk Reduced Size 256MB Dual voltage MultiMediaCard MMCmobile (RS-MMC) 

 
The Reduced Size MultimediaCard (RS-MMC) is a small, removable flash memory card used in mobile phones for the storage of content, images, video and music. It also has an adapter to make it interoperable with other MMC based devices.

Now Compatible with the Nokia 6630 & 6680, but also compatible with all the older RSMMC & MMC devices

This card provides memory upgrade options for RS-MMC mobile phone users to save and transfer more content to and from their mobile phone.
 
compatible with: 
i-mate: JAM, JASJAR, PDA2, PDA2K
Motorola: A920, A925, MPx200
Nokia: 3300, 3650, 3660, 6230, 6230i, 6260, 6600, 6670, 6680, 7610, 7710, 9210i, 9300, 9500 Communicator, N-Gage, N-Gage QD, N70, N90
O2: XDA, XDA Exec, XDA II, XDA IIi, XDA IIs, XDA Mini
Orange: M1000, M1500, M2000, M500, M5000, SPV, SPV E100, SPV E200, Treo 600, Treo 650
Samsung: P730
Sendo: X
Siemens: CX75, M75, S65, SP65, SX1
T-Mobile: MDA Compact, MDA III, MDA Pro
Vodafone: VPA Compact