Since update IOS 8, phone won't ring, no missed call and then I see voicemail notification

Do you see a crescent moon at the top right next to your battery on the home screen.

If you do that means you have do not disturb on.

settings - do not disturb - off

or swipe up on your home screen and click on the moon icon to turn it off.

have you check settings - do not disturb - off?

Use the side control and put your phone on ringer.

If do not disturb isn't turn on I don't know what else it can be.

Can you try calling yourself to see if it will ring after you've use the side controls.

I am having exactly the same problem

Since update to IOS 8.0, my iPhone 5 has no ring tone, and no notify tone, only a quick vibrate on incoming calls or notifications
Phone is NOT muted, Do No Disturb function is NOT enabled, all other sounds and volumes are normal

(Games have normal playback, etc)

Have restarted phone multiple times

Are there only two of us having this problem?

Sounds like your problems could be a bit different in that I didn't see you comment about missed calls not being captured. Under Settings>Sounds have you looked at Ringer Volume and is the Change with Button slide on? Is Lock Sounds slide On? Have you changed these Settings and tried a Call? Any Restrictions on Volume Limits? Have you selected another Ringtone ...just to see what happens?

How about Airplane Mode?

I have the same issue. My phone does not ring when it is called - doesn't matter whether it is locked or not. Do not disturb is off. I can change the ring tone and it "announces" the new ring tone but still doesn't ring.

I do see missed calls.

My resolution was simpler than expected: a cheap phone case that was pushing the mute button slightly out of true.

found out that if I take the case off and switch the mute button off and back on, the problem goes away.

Phone rings as normal and messages are collected, even once I put the case back on

Go figure

I'll just pile on here as another victim. iPhone 5C IOS8, iPad Air IOS8, 1 year old iMac/Yosemite & mid-2010 MacBook Pro 13"/Yosemite.

Initially everything BUT the phone would ring, but I could not answer calls on any other device (I tried every available button), and a notification would stay on the MacBook Pro's screen until I "rejected" the call - usually 15 minutes later.

Phone is not in Airplane, muted, silenced, do not disturb or any other mode. I rest ringtones - they work fine. I get calls - nothing except a VERY short vibration; even if I see it I have no time to answer. I'm trying to find an automated callback system so I can keep trying things but no luck yet, so I have to have a friend call me to test it.

I went back through the feature announcements for both operating systems and saw nothing about computers taking phone calls or messages, nor do I WANT them to. But I WOULD like my phone to ring, just like a real phone!

So far I have not found a single "feature" in IOS8 or Yosemite that is useful, saves time, or does anything but look pretty and foul up day-to-day activities (and the new Safari is absolutely awful!).

What the heck is Apple thinking? But for now - HOW CAN I GET MY PHONE TO RING AGAIN?

I was planning to "jump" to a 6+. Fat chance now.

I cannot get an alert to display when I miss a call. The badge increases, but no alert.

I was having the same problem. No crescent moon and DND was not enabled. I toggled the ring/silent switch on the side on and off and voila, it rings again! Seems like a problem with IOS 8, though.

I think I have the same...not great as am an on-call doctor and actually quite dangerous for me to miss calls

The phone is on vibrate, DND is OFF. If someone calls, phone vibrates intermittently and irregularly as if someone is sending a flurry of texts but there is NO sign of any notifications and NO sign that anyone is trying to call me. The home screen looks normal during all of this and the phone is responsive. After the vibration ends, the phone app has no indication of any missed calls. The only way I knew was through an O2 text alert that a call had been missed.

This is on iOS 8.1, persisted following a restart and soft reset. Phone was connected to home wifi with mac also on network, continuity features on and I had been using a bluetooth speaker earlier on.