Instagram allow users find anyone on the social network as long the person you want to add is registered on Instagram with the same phone number you have on your phone-book. The steps below highlight how you can find a person on IG using a phone number. On the page, Instagram shows you the total number of contacts on your phone-book that are registered on Instagram. You can then proceed to scroll through the list to see find the whoever it is you want to follow, view their profile, photos or videos. NOTE:
You can only find users whose number you have saved on your device.If the user didn’t link their mobile number to their profile/account, they will not appear on the list in the Find/Discover People section.