For all mobile phone users, regardless they are iPhone or Android users, the most valuable data on the phone are normally contacts. For example, if you lose apps on your phone, you can always download them again. But if you lose the contacts on your phone, you will have troubles contacting your families, friends and colleagues. You can only try to use a data recovery tool to get the contacts back. In order to prevent this situation from happening, you need to backup the contacts constantly. So we will show you four methods to backup the iPhone contacts in the following article.