... Sending vCards back to your iPhone

If you get stuck have a quick Google of
"Import vCards to iPhone"

Likely the easiest or most common way: Via iCloud (Web)

This is essentially the reverse of the steps outlined in the future post:

https://optimise-performance.blogspot.com/2021/11/iphone-contacts-to-excel.html

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Hence you can take your clean up Contacts from Excel / Outlook / .csv back onto your iPhone via VCF files.

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So YES, you can get your iPhone Contacts into Excel, clean them up and push them back onto your phone again!