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copied!<p>You need three things in order to make sure this update goes smoothly:</p> <ol> <li>Make sure your device is actually running 4.2.2 and the problem is not something else</li> <li>Your SDK is updated to the latest tools. The <code>adb</code> binary in all but the latest version does not support the 4.2.2 security enhancements.</li> <li>You are on the main account of your device in case of multiple user accounts.</li> </ol> <p>Connect your Device to your computer and execute <code>adb devices</code> (make sure USB debugging is enabled). You should see something like this:</p> <pre><code>3tiu52839ry082j3 offline </code></pre> <p>Right about now, there should be a dialog on your device that looks something like:</p> <p><img src="https://i.stack.imgur.com/WFjqS.png" alt="enter image description here"></p> <p>Check the <code>Always allow from this computer</code> box if you want and click <code>OK</code>.</p> <p>That's about it.</p> <p>Some other things to check:</p> <ul> <li>Make sure your USB cable isn't broken. Sometimes, the smaller cables break inside the main one, and your device may charge but have no data connection. Try with a different cable, or try accessing files on the device over USB (this will go fine if your cable is fine)</li> <li>Make sure you're using the newest version of <code>adb</code>. Even after I updated my SDK tools, I couldn't get my device authorized when using <code>adb</code>. I eventually figured out that the Nvidia install of the NDK and SDK tools had updated my <code>PATH</code> variable to use the <code>adb</code> from that install, which wasn't the latest update. By using the <code>adb</code> in my newly updated install, I was able to get it all working.</li> </ul>

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