I got the Kingston 4GB microSDHC. I have the Nokia E63 phone. It works. No problems at all. I can transfer files easily now. Works when I transfer between my Gateway PC running Windows Vista and also my ASUS EEE PC 1000H netbook to/from my Nokia E63.  The only thing I'm mad about is the fact that it is sometimes cheaper on Amazon than what I bought it for ($11.57).