my iPhone 6 doesnt ring anymore can't figure out what button i mistakenly touched

[iMore Question]

it vibrates onlyand if I'm looking at the screen I see who's calling but no sound

 

[olearydan]

Is it the physical switch on the left side? The one above the volume controls. Also take a look at your "Sounds" settings inside the Settings app and make sure everything is set the way you want. And finally sometimes a good old fashioned reboot is needed.

 

[Rob Phillips]

Is there a moon icon in the upper right hand of the screen? If that's the case you turned on Do Not Disturb. Swipe up from the bottom of your screen to open control center and tap the DND button (which has the same moon icon on it) to turn it back off.