How to delete duplicate contacts

Hello shalvini,

We understand that you're seeing duplicate contacts on your iPhone. Did you recently set up iCloud Contacts? If so, check out, If you see duplicate contacts after setting up iCloud Contacts - Apple Support and try the actions provided there, to address this issue.

Below we've provided a link to the WhatsApp help pages that covers how to back up your WhatsApp data to iCloud. If you're looking for other options to back up your data, outside of using iCloud, be sure to check with WhatsApp Support for your options.

https://faq.whatsapp.com/180225246548988/?locale=en_US

Best regards.