Originally Posted by cyrus_ae
Did you enable the ADB?
You'll need ADB active on the phone.
And a new / updated version of the ADB drivers / tools on your desktop.
Also, you will get a dialog prompt on the phone to confirm a security encrypted key (to allow ADB between your desktop and your phone)
This is something Google introduced on 4.1 (I think) which, if is not set, will end in a "devices not found" when trying to use ADB