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I frequently set my Galaxy S7 to vibrate mode, however it keeps turning vibrate mode back off. I can't figure out what exactly is causing this.

I know at least one condition that triggers this consistently. Whenever a call is ended or rejected for any reason, vibrate mode will turn off on its own. To get around this, when I go to bed I put the phone in airplane mode to prevent any calls from coming in at all, but leave WiFi on so other things still have connectivity. Unfortunately, I discovered that vibrate is still turning off even when in airplane mode.

This is becoming a major problem as I need to trust that my phone will remain quiet when I need it to.

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  • Probably an app doing it, especially one that has access to calling. Any app can change your phone's ringer volume with no extra permissions.
    – owlswipe
    Dec 7, 2016 at 1:07
  • Is there any easy way to find out what app might be doing this? Dec 7, 2016 at 9:12
  • It's definitely an app with a running process: android.stackexchange.com/a/125388/168531
    – owlswipe
    Dec 7, 2016 at 12:18

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