Output via USB
~$ adb devices
List of devices attached
0123456789ABCDEF offline
Output via Wi-Fi
~$ adb devices
List of devices attached
192.168.1.2:5555 offline
a) At first check the adb version, should be 1.0.31 or 32, if not, upgrade to the newest SDK / adb
Run the following command:
~$ adb version
Android Debug Bridge version 1.0.31
Run the following command:
~$ android update adb
b) Go to "Development options" on your phone and click "Revoke USB debugging authoriz.."
