If you want to recover a text message, tap on the thread or message so that it's selected, hit Recover on the bottom right, ...

the email contacts should be restored to your list. 3. Restore Contacts on your iPhone from a Mac Backup Connect your iPhone to your Mac. If you have previously backed up your iPhone to your Mac ...

So, suddenly, finding your iPhone contact list empty or numbers missing can scare the hell out of you. Fortunately, a way exists to restore iPhone contacts via iCloud if you accidentally deleted them.