I have an xt901, but it is recognized as a xt907. They are the same hardware, but they have different radio firmware. I installed Motorola drivers 6.3.0. I get a message asking what to do when I plug it in. RSD won't recognize it. DFS does not recognize the device either. I have even tried to get the computer to recognize it when it is in fastboot and BP Tools. I am using xp.