how do i delete duplicate contacts on iphone

If you have the same contacts stored in multiple email accounts and if you add these accounts in an iPhone it may display as duplicates.

Unlike some Android devices, contacts are neither stored locally on an iPhone nor in SIM. They are synced to an email account that you had Google, iCloud, AOL, Exchange, Outlook, Yahoo or any Other

I only have 4 devices but now have as many as 13 duplicates for one contact. This only started about 3-5 months ago. I’ve used a Mac, iPhone, and iPad for 10 plus years.