No matter how careful you are, you are likely to lose data from your iPhone, computer, etc. due to different reasons in the daily life and work. So one day, you found some important contact number have gone from your iPhone, please calm down. You can find some effective way to recover deleted or lost contacts from iPhone with ease.

1. How to Restore Deleted Contacts on iPhone
Actually, everytime you sync iPhone to iTunes, it will automatically generate a
backup file and save on your computer. However, you can't find them easily. Thus, if
you want to restore deleted contacts on iPhone, you need to find a reliable iPhone
Contac Recovery software as your assistant - Coolmuster Data Recovery for iPhone
iPad iPod (Windows Version) and Coolmuster Data Recovery for iPhone iPad
iPod (Mac Version).
Steps on Recovering Deleted Contacts from iPhone 5/4S/4/3GS
The tutorial below is about the Windows version of Coolmuster Data Recovery for
iPhone iPad iPod.
Step 1. Launch the program and you'll found all iTunes backup files have been
detected and displayed in the main interface. Just choose the one of your iPhone and
press "Start Scan" to begin to scan for files.
Step 2. After the scanning, you'll be showed a list of lost data files on the left,
including contacts, messages, camera roll, photos, etc. To retrieve deleted contacts
from iPhone, you can choose "Contacts" and find those contacts you want back. Then
click "Recover" to save them on your computer. Done!

2. Tips: In order to avoid losing contacts from iPhone again, please backup your iPhone
frequently.