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Re-Enabling USB Debugging in Android 4.3

Jeff Davies
Cloud Success Manager

It's been a while since I've deployed an ADF Mobile app directly to my Samsung Galaxy S3; apparently since December of 2013. It was on that date that my mobile service provider upgraded my phone to Android 4.3 and in the process, turned off USB debugging.

It started with an unusual error message when I tried to deploy the app to my phone:

No device authorization

Technically, USB debugging was still enabled on my device, but the device certificates were lost, so as you can see in the screenshot, my device was on a USB connection, but it did not recognize my computer as a legitimate USB connection. Hence the unauthorized note listed with my device. Just for test purposes I turned off the USB function completely and got a slightly different error:

The error message when USB is complete disabled

Both errors start out with "Failed to detect a connected Android device". A little bit of research led me to the solution which is quick and simple, though totally arcane and non-intuitive.

On your device, go to the Settings app and click on the More tab and then click on About device

Start in the Settings app and Choose the More tab, then click on About device

Next, locate the Build number entry in the list and quickly click on it 10 times in a row. You should see a little message popup each time you click the list item.

Click the Build list item 10 times quickly to enable Developer Options

Next hit the Back button and you should now see Developer Options listed in the More tab. 

The Developer Options list item now appears in the list

Click on the Developer Options list item and it will take you to a screen that allows you to re-enable USB debugging and accept new device certificates.

Finally, you have access to the Developer Options screen again!

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Comments ( 22 )
  • guest Thursday, March 20, 2014

    In nexus 5, its getting enabled after tapping 7 times.

  • George Friday, April 25, 2014

    Very well written article,It has helped me a lot in debugging, thnx for sharing

  • guest Sunday, June 8, 2014

    very helpful, thanks

  • guest Tuesday, July 1, 2014

    I already done that but still my device not recognize by my laptop, OS win7 64bit. And on my device, usb tethering was colored gray. How can i enable it??? Any suggestion??

  • Jeff Davies Tuesday, July 1, 2014

    @guest - Its hard to say why your phone is not being recongnized. I had similar problems with my Samsung Galaxy S3. Try the following before contacting your mobile phone company for product support

    1) Be sure to use the USB cable that shipped with your phone

    2) Plug the USB cable directly into your computer, NOT into a USB hub

    3) Update your computers software for your mobile phone (Samsung uses an app called Kies, other vendors may have similar apps)

    If those steps don't help, call tech support for your phone manufacturer.

    - Jeff

  • Metaspace Friday, July 4, 2014


    Many thanks!

  • Farookh Shaikh Friday, July 11, 2014

    Perfect explanation. Thanks buddy.

  • guest Monday, July 14, 2014

    Using Galaxy S3 connected through a USB hub, the phone was not even detected by the device manager. But when plugged directly to a USB socket of the PC, every-thing work perfectly.

  • Pankaj Monday, July 14, 2014

    Very good. Yaar.

  • guest Saturday, August 2, 2014

    Thank you very much :)

  • sajid Friday, August 8, 2014

    Thanks works on Grand 2 4.3 stock rom

  • guest Monday, August 11, 2014

    MY galaxy s3 isn't recognozed by computer. i tried all of the above still it wont connect. I enabled usb debugging option in developer option. also used that code *#7284# but these didnt help me. Please someone tell me how could i use my s3 as usb drive with computer and transfer data?

  • electric Saturday, October 18, 2014

    thank you!

    Can't even properly backup the device without developer options. And tapping inactive menu item isn't exactly intuitive solution.

  • guest Wednesday, October 29, 2014

    Thank's million's

    these steps worked for me .... :)

  • badger Friday, November 14, 2014

    All these options have failed to fix my Huewei Y330 01. And now the screen has loads of small text scrolling over continually. Should and could and how do I turn of developer status?

  • guest Wednesday, February 25, 2015

    great thanks a lot

  • guest Sunday, March 1, 2015

    I tried all the above, nothing worked.

    So i did a factory reset. Now it works perfectly fine, I can connect my phone to the PC. Yes, I lost my data.

  • idadtech Thursday, March 12, 2015

    Thank you Very Much this helped me

  • guest Wednesday, August 19, 2015

    good its working thanks

  • Roy Thursday, November 19, 2015

    I got a lot of information form here, amazing article thanks

  • guest Wednesday, April 20, 2016

    i accidentally hit revoke USB debugging. now I am locked to use my computer and connect to my android through USB

    what should I do


  • Jeff Davies Thursday, April 21, 2016

    I'm not sure how to re-enable USB debugging for your specific platform. I'd check on the Android Developer boards and on the support site for your specific mobile device. Best of luck!

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