If new contacts you have created since upgrading to the latest version of iOS aren't showing up in your contacts list, there is a simple tweak in settings that can fix the problem. To fix this problem, head to Settings > Mail, Contacts, Calendars and scroll down to the Contacts section. Tap on the bottom line of this section, Default Account. Tap to select iCloud instead of On My iPhone or, if you have multiple accounts, your default account.
Now, when you create a new contact, it will show up in your Contact list. Any contacts you created since updating to iOS 7.1.2, however, will not magically appear. Sadly, you will have to copy and paste numbers and re-create those contacts.