I've had a problem with my iPhone ProMax duplicating contacts for over a year. I even bought a newer phone, the 17 Pro Max 6 months ago but the problem is ongoing.
All Contacts shows over 30,000 with 29,361 in "all lCloud" and 755 in "All Hotmail".
Several calls with Apple haven't fixed the problem. They don't seem to know what to do. It would take me forever to delete the 30,086 contacts one by one.
I see in this forum that others have had this problem for a while so I'm wondering if anyone knows how to fix it...???