Originally Posted by SKPhoton
FWIW, I'm using a Sandisk 4gb SDHC card in mine and it works perfectly.
Are you able to copy your media files to the whole card up to 3.6 GB or whatever is available? And could you please say what firmware your phone is using now? Mine is (taken from About):
V.18.104.22.168 (Platform 22.214.171.124)
maybe it's not the latest one provided us by T-Mobile.
Also what's the maximum speed when you copy files from your computer to the phone? The speed that I see is pretty low - 500-600 kbytes/sec. Having the same card in the card reader gives me over 9-10 Mbytes/sec.