Hi!
I got: Nokia 5200 and Nokia 5310 , them both work as:
+ Storage Device
+ ACM Modem
+ And, off course, via bluetooth.
No problems. The funny part: the "memory" looks like an scsi device, no
partition (sdb , in my case), so, mount /dev/sdb /media/usbx would do the
trick for me. Oh, I hasn't tried to plug my phones without the minisd
card.
I'm using Linux kernel 2.6.24.2 , Debian Sid.
I haven't tried 5300, but 5200 and 5310 are pretty much the same, and 5300
looks like a 5200 "with steroids".
Btw, them both have a problem with mp3 codec, so, from time to time, they
just "reset" while playing music :( . Fortunelly, it is uncommon (about
once every 10 hours of music or so).
I hope this helps.