MultiMediaCard
Definitions
MultiMediaCards (MMCs) are small, removable memory cards used in many devices such as mobile phones, PDAs and digital cameras. MMC used in Nokia 770 is actually a newer type of MMC called RS-MMC or Reduced Size MultiMediaCard. Its dimensions are only 24mm x 18mm x 1.4mm yet it is compatible with older type of cards by using an adapter. More information can be found from the website of MultiMediaCard Association.
Also normal (full sized) MMC and SD (Secure Digital) Cards are known to work in the 770 without modifications.
There are single voltage or dual-voltage RS-MMC cards, also there are MMCMobile and RS-MMC cards. This makes different categories, of which not all may be compatible... needs to be confirmed precisely. For an explanation of differences this may help :http://flash.atpinc.com/articles/view.php?article_id=1186
Following thread may also help : http://www.internettablettalk.com/forums/showthread.php?t=298 (RS-MMC or MMC Mobile).
List of MMC cards compatible with Nokia 770
If you want to, you may report models that you have tested and work with the Nokia 770 :
| Model | Capacity | Compatible | Reported by | Comment |
| Nokia (?) MultimediaCard 1.8/3.0V | 64 Mb | Yes | OlivierBerger | Default card provided with Nokia770 |
| Nokia MMCmobile Card Dual Voltage 1.8/3.0V MU-12 | 512 Mb | Yes | OlivierBerger | Note that packaging explicitly mentions Nokia 770 |
| Transcend MMCmobile Dual Voltage | 1 GB | Yes | FredericCrozat | |
| Nokia MMCmobile Card Dual Voltage 1.8/3.0V MU-13 | 1 GB | Yes | PatriceTisserand | |
| Kingston Mini MultiMediaCard Dual Voltage | 512 MB | Yes | mazesloup | |
| Kingston MMC mobile Dual-Voltage | 1 GB | Yes | Torsten | |
| SanDisk RS-MMC | 256 MB | Yes | Michael Mlivoncic | |
| SanDisk RS-MMC | 1 GB | Yes | Henry Tang |
Models that should work :
| Model | Capacity | Compatible | Reported by | Comment || |
| Nokia MultimediaCard Dual Voltage 1.8/3.0V MU-9 | 256 Mb | To be tested | Available on the nokia internet store as compatible with the N 770 |