My I phone does not always ring for incoming calls. How do I fix this?

[Dadwapple5c]

My iPhone 5c does not always ring for incoming calls.  Works rarely, and the caller gets switched to voice mail after 1 or 2 rings when the phone does not ring.  Anyone have a solution for this?

[#2]

Check to see that Do Not Disturb is not on in your settings.

Settings-Do Not Disturb-Allow calls from everyone, repeated calls set to on (Green Toggle)

Nothing else should show green.

Good Luck

[SierraTech]

If DND set is correctly, does your phone show LTE or 1x?

[#4]

That would have nothing to do with "Do not disturb" that can be a tower issue or a location issue or even the location of your device.

Good Luck

[SierraTech]

Unfortunately if you don't receive at least 3G ( iPhone displays 1x), your phone won't ring, and goes directly to voicemail. Happens on iPhone 4, 4S & 5. It has happened to several of my clients, myself included (DND can also cause this as you stated).