I am using Debian Linux Sid with kernel 2.6.16, and the SE Z520a works fine with it over Bluetooth using a generic USB adaptor. The phone supports OBEX file transfer, allowing me to copy pictures and videos to and from the phone, and to delete them, also, using Kbluetooth and the Konqueror file manager. Using the following ffmpeg command [ffmpeg -i videoname.mov -s qcif -r 15 -b 64 -vcodec mpeg4 -ac 1 -ar 8000 -ab 12 -acodec aac -pass 1 videoname.3gp] I was able to convert videos into a format that can be played on the phone to entertain the kids. They can only be a half an hour at the most, however due to the 16mb file size limit. I have not tried to use the phone as a modem as I do not have any internet or data on my account at the moment. That will probably have to wait for the future as I do not yet have a computer that needs such services. Using OBEX SyncML to transfer the address book over Bluetooth does not yet work in Linux, but it is being worked on, and will hopefully work in the future. Otherwise, the other reviews covered all the other aspects of the phone. **Update** Ich have now used it as a modem with Linux and it works fine.