What is your card size?

I use a 1 GB micro SD card in my nokia 6120c. I have the latest firmware on my cellphone. I can feel there's no problem for my cellphone to load that card. But my friend with a same cellphone type but not latest firmware doesn't feel easy to load his memory card data. A bit of lagging. I think 1 GB is good enough for me. I have 2 pcs of 1 GB micro SD card and 1 pcs of 512 MB micro SD card. I save my multimedia data separately. So i don't need to worry about hanging or lagging problem. I think the bigger memory card usually easy get corrupted due to unsupported phone's firmware. Have a nice day and happy mylotting.

I use htc touch, it has 2GB card. Its working fine.

I have 4gig card in my blackberry pearl. Sometimes I take it out of my phone & use it in laptop as well. Makes it easier to transfer files back & forth since my laptop doesn't have wifi.