Has anyone else noticed the Amazon MP3 App (the one that comes preinstalled with the phone) doesn't work if Wifi is turned on? I've tried it on two wifi networks (home and work) and I can't purchase or download if it's on. I don't know if it matters, but both networks use WPA2. One is PSK and the other uses RADIUS authentication. Has anyone else experienced this and if so does anyone know a fix?