Why is the sound on my Apple iPhone 6s not working
How to turn up ringer on Apple iPhone 6s
It might be that the Apple iPhone 6s has been set to silent, and therefore is not able to make any sound.
In the top left corner, make sure that the silent switch is not turned on. If that is the case, turn if off.
Then, put some sound on the Apple iPhone 6s by using the built in sound up button on the side of the Apple iPhone 6s.
Do no disturb
It is also possible that the Apple iPhone 6s has been put in the do not disturb mode.
In the Settings > Do not disturb menu, check that both manual and scheduled options are set to off, to make sure that the do not disturb mode is not engaged.
How to turn ringer up on Apple iPhone 6s
Then, put ringer and alert sound, by going in the Settings > Sound menu, where it is possible to mute or unmute the volume for the sounds, alerts, and the ringer.
Headphones check
As a security, if you still don't hear a ring at this point, try plugging in your headphones.
It is possible that the phone got stuck in the headphones mode, and won't play loud sound, but only play sound in the headphones.
If that is the case, try to plug and unplug them a few times.
If that didn't work, try restarting your Apple iPhone 6s.
Backup and restore
The last restore after having tried all previous, is to perform a full backup and restore, as this might solve any possible software issue on your phone.
If this last solution didn't work, then the issue is most likely hardware, and the Apple iPhone 6s should be brought to a specialist for physical repair, as some component might be damaged.
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He is an enthusiast technology specialist. His goal is to help everybody experiencing troubles with their phone finding the solution, and making the best use of their devices and apps.