Why doesn't my iPhone ring only vibrates, manual button is off and mute button side is not on red?

[iMore Question]

iphone does not ring only vibrates, manual button is off and mute button side is not on red

this problem seems to have started with 9.2 update

 

[Just_Me_D]

Re: iphone does not ring only vibrates, manual button is off and mute button side is not on red

If the "manual button" you referenced is the same as the volume buttons on the side of the device then you've answered your question. Press the up volume button to an audible level.