KathyN Said:
"Incoming/outgoing calls fail on iPhone 11 Pro Max: [...]Is this a hint from my phone that I should check out 14?"
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Thank you for the followup reply.
Update Immediately, Backing Up, First:
Update your iPhone to iOS16. Update have bug fixes and feature on-ons. Note that only the latest update will install (iOS16.0.2 as of this reply). iOS15 and before are no longer available.
A. Time to Update iPhone:
That depends on the capacity, and how much has to be modified to operate with the new iOS. So, perform this while at home, with nothing on your schedule.
B. So, Update Using a Computer:
For a more reliable connection, try updating using a computer... Use my User Tip: Update your iPhone Using a Computer - User Tip