Phone is silent when locked.

Nanc7745 wrote:

My phone is stuck in silent when locked. How do I change that? In Do Not Disturb, it can't be undone. Please help. I have missed many important calls.

If Do Not Disturb is off then none of the switches in DND settings do anything.

If you have an Apple Watch that has wrist detection enabled the phone will not ring when locked, instead the watch will signal an incoming call.

I believe that Silent While Locked, outside of the Do Not Disturb time window, is only a function of the physical Ring/Silent slider switch on the side of the iPhone.

Some of the reasons are listed below which may silence your calls

1. Bed Time schedule
2. Call Audio Routing method
3. Ringer Volume level
4. Call Forwarding to another number
5. Silence Unknown Callers [Enable] Calls status : Only numbers in Contacts, Mail, and Messages ring your phone. All others are diverted to VM
6. Have you done any of these; decline a call and send it directly to voicemail, by doing one of the following:
   1. If iPhone is unlocked, tap Decline.
   2. If iPhone is locked, press the side button or Sleep/Wake button (depending on your model) twice quickly.
   3. On your EarPods, press and hold the center button until you hear two low beeps.
   4. To be reminded to return the call, tap Remind Me, then choose when you want to be reminded.
   5. To respond with a text message instead of answering, tap Message, then choose a reply or tap Custom.
   6. Block unwanted callers: In Favorites, Recents, or Voicemail, tap  to see a caller’s contact card, then tap Block this Caller. Or go to Settings > Phone > Blocked Contacts. You don’t receive voice calls, FaceTime calls, or text messages from blocked callers. All are diverted to Voicemail