Best Answer Boolanger , 01 November 2013 - 18:59
I don't beleive it is so much a bug as a (odd?) feature, 15 is likely the volume limit for kid's corner on the 520. on my 920 it is 13 and my volume is set to this every time I restart.
This is get defaulted so that you don't unexpecting blow out your ear drums, while extremely hard to do they just watching out for you(covering themselves)
The best solution I can provide would be to turn the phone to vibrate or silent instead of just turning the volume all the way down.Go to the full post