I did something silly yesterday afternoon. I went on a bit of a buying spree and, in addition to Logitech speakers to replace the pair I blew, I bought a 256MB RS-MMC for my Nokia 6630. The only problem is that my phone doesn’t pick up the card at all. I returned it to the shop I bought it from and they are trying to work out what the problem is. In the meantime I have done a little research and it turns out (and I did know this), the Nokia 6630 works with a DUAL VOLTAGE (1.8v) reduced size multimedia card and not the normal reduced size multimedia cards which run at somewhere around 2.7v to 3v.
It seems that a number of people have this problem (based on searches that bring people to this site) so here are a few links which may be helpful:
Apparently, Samsung has manufactured a range of dual voltage RS-MMC cards. They put out a news release in March 2004.
The bottom line is that you should be careful when you buy a RS-MMC because it may not work. Check it is a dual voltage card first and that it will work in your Nokia 6630. This applies to all phones that use memory cards – make sure you are buying the right one for your phone. You don’t want to wind up with an expensive card you can’t return and have no use for.