I just bought an Apacer 256MB MMC for my 3660. it shows "mmc corrupted, format now?" i said yes, then after the progress almost finished is said something like memory error or something. i tried the mmc with my pc card reader it works perfectly.
i have the same problem last time with the 32mb mmc. fixed it by formatting with the card reader. I even tried to reformat the 256 with the card reader, still the phone cant reconize the mmc.
I know someone with the 3660 using the same brand and it works without any problem :con? i dont think the mmc is bad because it works perfectly fine with my card reader. I cant test it on another device yet