how do i stop my galaxy s4 ringer volume from alwats going down

[AC Question]

I am missing a lot of calls because my ringer volume keeps going all the way down to the point I can't hear it even when I lock my phone

 

[itguyjax8430]

I am missing a lot of calls because my ringer volume keeps going all the way down to the point I can't hear it even when I lock my phone

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Does the volume down button seem to be stuck?