Procedure:
1.Go to Menu->Settings->More->About Device.
2. Tap on "Build number" 7 times to enable developer options.
3. Go to Menu->Settings->More->Developer options.
4. Turn on "USB Debugging" option.
5. Go to dial window.
7. 5.Enter "*#0808#" number.
tapo click unlock
Done....
http://i1236.photobucket.com/albums/ff451/alfajef31/Snapshot_zpskxhhrrti.png
http://i1236.photobucket.com/albums/ff451/alfajef31/20150730_153256_zpsmevduerk.jpg
1.Go to Menu->Settings->More->About Device.
2. Tap on "Build number" 7 times to enable developer options.
3. Go to Menu->Settings->More->Developer options.
4. Turn on "USB Debugging" option.
5. Go to dial window.
7. 5.Enter "*#0808#" number.
tapo click unlock
Done....
http://i1236.photobucket.com/albums/ff451/alfajef31/Snapshot_zpskxhhrrti.png
http://i1236.photobucket.com/albums/ff451/alfajef31/20150730_153256_zpsmevduerk.jpg