How do I find a recently added contact?
Solution 1:
On iPhone, you can download several different apps.
The one I found was free, quick, and simple called 'Recent Contacts' by Kyle Gorlick.
On Android there are also several apps, but I have not tried them myself.
Solution 2:
The built-in contacts app doesn't provide a user-friendly way to search by 'most recent'. This app is very basic and is good for most users but, as you've experienced, if you need something a bit more advanced, it won't work as well. You can try doing a Spotlight search by the location you were at or by the company that person works for, any little thing they might've added to their contact on your iPhone.
If none of those approaches work, and you're not willing to jailbreak to get access to the Contacts database, you can try going thru each name one-by-one until you see it. It's slow and annoying, but it works.