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I have an HTC one, running Android 4.2.2 overlaid with HTC Sense 5.

I am trying to plug it into my car stereo. All I want to do is play audio from spotify via my car stereo (which wasn't a problem with my old HTC Desire). However, with this phone I can't charge and play at the same time.

It works fine if I plug the phone into the 3.5 mm jack on the car and play via media mode on the stereo. However, when I also plug it in to charge via USB it doesn't go onto charge only mode, but "USB debugging connected", which confuses my car stereo and means it will stop playing music (even if it was playing fine before when it was just connected to 3.5mm).

I can't switch this USB debugging option off, even when I manually switch it off in developer options it switches itself back to usb debugging mode.

I have found numerous threads around the internet with the same issue and lots of discussion and no solutions that I can find, though most are a little old now.

Does anyone have any ideas how I can stop this behaviour of auto-enabling USB debugging?

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migrated from superuser.com Nov 18 '13 at 18:28

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Is your phone rooted? It's not possible for apps to turn on USB debugging without root, for security reasons. –  Dan Hulme Feb 8 at 14:38

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