exit the iPhone Phone app.
Simply switching to another app or returning to your iPhones home screen wont exit the Phone app.
This process can also correct any connection errors you may be having with your cellular provider.
Turn Airplane Mode off.
If on, this feature will prevent anyone from calling you, and keep you from contacting others.
Switch Airplane Mode on and off again.
This will reset your connection.
Turn on Mobile Data.
Swipe down from the top-right corner of your iPhone and check that the Mobile Data icon is green.
If its not, tap it to turn it on.
Are you using the right app?
Did you pay your mobile bills?
Its possible that you may have missed a payment and yourmobile carrierhas limited your call functionality on your iPhone.
Call your provider from another phone or visit a branch to verify that everything is okay with your account.
Check the Slide switch.
If the switch is orange, this means its activated.
Flick it upwards to turn if off.
You should now be able to hear phone calls again on your iPhone.
Disable Do Not Disturb Mode.
The Do Not Disturb setting has been known to be behind situations when the iPhone Phone app freezes.
This can clear up any conflicting data that may be behind your broken iPhone Phone app.
tune up your iPhone.
This will reset your iPhone to its factory controls and give you a fresh start.
Before resetting or restoring your iPhone, make a backup first.
This will prevent almost all data loss.
This should be considered a last resort as it can result in some data loss.
How iPhone Phone App Problems Appear
iPhone Phone app bugs can take various forms.
The incorrect parameters being activated or deactivated can also be behind Phone app issues.
Fortunately, there are a number of fixes for such iPhone Phone app problems.
