Here is a wonderful and effective way to recover your unfortunately deleted or lost Contacts phone numbers. It requires an Android phone contacts recovery tool: Android Data Recovery, which allows you to undelete and recover your phone numbers directly, as well as messages, photos and videos from Android.
Please get this program with below buttons to get back the deleted contacts to your Android phone contacts list.
How to Restore Lost Phone Numbers from Android PhoneNote: Once you find your Android data get lost unintentionally, please try not to use your device if possible. It is because when you add or delete any phone number after losing data, the data you want to restore can be automatically overwritten. That is, your phone number that deleted unintentionally is likely to leave you forever.
Step 1 Connect your Android phone to the computer
Once you install and run the program, it will ask you to connect your Android phone to the computer. Please plug your Android into computer via the USB cable that is matched.
Step 2 Enable USB Debugging on Your Android
If your phone has not open USB debugging, this program will prompt you to move to your Android phone to enable USB debugging.
1) For Android 4.2 or newer: Enter "Settings" > Click "About Phone" > Tap "Build number" for several times until getting a note "You are under developer mode" > Back to "Settings" > Click "Developer options" > Check "USB debugging"
2) For Android 3.0 to 4.1: Enter "Settings" > Click "Developer options" > Check "USB debugging"
3) For Android 2.3 or earlier: Enter "Settings" > Click "Applications" > Click "Development" > Check "USB debugging"
After your device identified, you can get your Android ready to be scanned. Tick the ones you want so as to save more money. For example, "Contacts", and click next to start the scan.
Step 3 Allow Software to Scan Lost Data
Note: Before starting, please make sure that battery of your device is more than 20% charged.
When you get a window as follows, turn back to your phone again and click "Allow" to permit the Superuser Request, and then click "Start" on the program's window to begin the scan.
Step 4 Preview and Retrieve Phone numbers
When the scanning finish, you will find all your deleted(orange ones) or undeleted(black ones) contacts are listed on the right window. Choose those you want and click "Recover" to save them to your PC.
Step 5 Check the Result on PC
After recover your phone numbers on your computer, you can check the contacts you just restore on the folder which is pop-up automatically. On the folder, the contacts are exported in the format of SCV, HTML and Vcard.
Note: After recover your phone numbers to your computer, you can import them back to your Android phone.
Now, all your lost phone numbers have been saved on your computer with the help of this Android Data Recovery. Though it could be possible to recover the deleted data, back up your Android data frequently will be encouraged to prevent your Android data from losing forever. In this way, please just back up Android data from time to time.