Your mobile phone is at least on ICS, like my HTC One V, so for the first time doing a file tranfer via Bluetooth, go to the Desktop and bring up the Bluetooth icon, do right click and select Receive a file. On your mobile device, select photo, for example, and select Share, then select Bluetooth, when it finds the Surface RT, it will automatically initiate the pairing sequence and download the device driver. Once you complete it, doing a file transfer is so easy. As to tethering, I find WiFi tethering to be the best.