I've recently received a new Transform Ultra (SPH M930). I'm also a Linux user and expected to be able to mount the phone SD card as a mass storage device. This does not work, for three different boxes with various versions of Linux 64 bit systems: Kubuntu 10.10, a recent Linux Mint, and Ubuntu Studio 12.04.1 LTS. It does not connect with a Macbook Pro running Lion, either. It does connect with a laptop running Windows 7, so I know the basic hardware and the cable are OK. I was able to browse and transfer files without any problems. Any suggestions to get this working would be appreciated. I've been able to do what I need using wireless networking and an FTP server on the phone, but this only works at home.