Hi, I just upgraded my iPhone 7 to iOS 14.7 and now I am not able to make calls because of the speakers and microphone. If the bluetooth is on, it can connect to my headphones, if not, no device is selected for audio. I am just not able to make calls anymore. This applies to other calls, I tried WhatsApp call as well. I tried to restart the phone but that didn't help.
iPhone 7, iOS 14
If you are unable make a call or receive; If you can't make or receive calls on your iPhone - Apple Support
Before updating to the latest iOS 14.7 as told in your post what was your earlier iOS version. Then you can look into the iOS changes that have happened between the earlier version on your iPhone and this new version that you have updated now.
This will give you a broader idea of the issue if it is directly linked to the iOS version or is triggered by something else.
Upgrade to iOS 14.7 broke call functionality
