This app will let you create a hotspot with your Raspberry Pi 3 with EasyTether as the wan. Reboot after install. To use, simply install it and then install EasyTether on your Android phone, enable USB debugging on your phone, turn on EasyTether, connect your phone to your Raspberry Pi and then connect your devices to the hotspot. SSID: pifi, Password: pifitether, 10.3.141.1 control panel username: admin, 10.3.141.1 control panel password: secret. Also works with ethernet port or default android tethering as wan.