I have it working fine on a Droid 1, and Droid X (the Droid 1 has the proximity sensor problem and you have to hold the phone away from you during the call process as indicated in the app instructions, but the X works fine). I've set it up on three other Android phones without any problems. In the GVMyNumberApp go to Settings. Google Voice Number is your Google Voice Number. Simple. Assuming you don't have a PIN on your Google Voice account leave that blank. Under Pause After Initial Dial try setting it to 6 seconds to start to make sure all is safe. Assuming you set it up to ask if you wanted to use GV on a call then when you dial a number it will ask if you want to use Google Voice or not. Works great for me.