As you know, contacts list is very important to all mobile phone users. There are probably all kinds of information of crucial clients and relatives, and you can get in touch with any people in your contacts list when needed. However， there're kinds of situations you would lost your contacts. But you are able to get your deleted data back if you own a professional and powerful recovery software to help you. Try Coolmuster Android Data Recovery, it's easy to use.
And you need to root your android phone at first, or the app can't detect your phone successfully. And stop saving new data to your phone, or the deleted data will be covered.
Step1: Connect android phone to pc and start the problem
At first, connect your phone to computer via USB cable, then start the app on your computer. Make sure your phone has been linked to computer correctly, or this data recovery problem couldn't detect it successfully.
Step2: Enable USB Debugging
You need to enable USB debugging on your device
Step3: Preview and Restore Contacts