you want to reset audio volume in Lumia 535?
hold power button and press volume down key until that phone vibrate, after that you can set volume back
you can also try using headset to test
regarding this question I suggest contact Windows phone support
find support based on your location and language
http://www.microsoft.com/en/mobile/support/locations/
- Edited by britishdhez 1 hour 53 minutes ago
you want to reset audio volume in Lumia 535?
hold power button and press volume down key until that phone vibrate, after that you can set volume back
you can also try using headset to test
regarding this question I suggest contact Windows phone support
find support based on your location and language
http://www.microsoft.com/en/mobile/support/locations/
- Edited by britishdhez Monday, March 09, 2015 5:22 AM
Hi Hoven,
For Windows phone question, you could post your question to Windows Phone forum in Windows community since you might get more useful help there.
Thanks for your cooperation and understanding.
http://answers.microsoft.com/en-us/winphone
Regards
D. Wu