If you've deleted your contacts or are suddenly missing some, don't worry! Contacts can be restored to automatic save points in time.
Caution - The restore will replace any changes or additions made to your contacts since that time, including contacts you have added after that date.
1. Click the Contacts Icon 
next to settings.
2. Click More 
| Restore.
3. Select the date from the drop down menu.
4. Click Restore.