In order to get the largest RS-MMC card i bumped on an MMC mobile card. The shop did not know if it is compatible with RS-MMC. So i gave it a try And it works I have the impression that it is twice as fast as the RS-MMC card which came with the N 770. When i checked how new The MMC4.0 definition is, one can wonder why in the specs of the 770 the MMC mobile card is not mentioned. Is the a chance that the MMCmobile card somehow is not compatible? RS-MMC are available here up to 512 MB My card is a MMc mobile 1GB card from Adata (www.adata.com.tw) Streetprice was (20060513) 40 Euro -- Frank W. Kooistra 770 - Itech VKB - 1GB MMC Mobile MMC4.0 The Netherlands