Hi there! I am trying to figure out this problem. my I9100 wont connect via the USB ports to my computer. I get an error "Unknown device". My computer is Windows 7 x64. When I connect it to USB, the phone starts charging, but wont connect (I got to setting > network > USB, select connect USB, I connect and then nothing happens, the dialog stays up saying connect to usb port"P) I have tried uninstalling the Samsung USB drivers, and then reinstalling them, that done nothing. Tried updating the driver via windows updates, that did nothing. So I am asking for some help be cause I am at wits end, and I cant seem to fix this issue.