Many people will think that the phone system upgrade, the original data will be lost. In fact, this is not a specific. The original data may be hidden in a folder. Actually missing files can be resolved by data recovery tools.
Android Data Recovery is a professional software. It can not only recover the lost data because of accidental deletion, but also can easily deal with other situations. For example, your mobile phone is locked/bricked, or your mobile phone data is lost because of rooting. Even if your phone data is lost because of the system upgrade, Android Data Recovery can help you to solve it. And the steps are easy to understand.
Supported File Types: Contacts, Messaging, Call History, WhatsApp messages & attachments, Gallery, Audio, Videos, Documents, etc.
Steps to Recover Lost Data from Android Devices after Updating to Android 7.0
Step 1. Run Android Data Recovery and Connect Your Phone to Your PC
Download and install Android Data Recovery on your computer. At the same time, Android phone should be connecting to the computer through the USB data lines.You also need to enable the USB debugging in your mobile phone settings. Because you need to give permission to program to manage your software.
Step 2. Select the File Types and Scanning Mode to Scan
You need to select the types of file you want to restore. The
software supports contacts, text messages, call logs, SMS, WhatsApp
messages and more. Just choose those what you want and click on “Next".
On the next screen, you are allowed to choose a scanning mode to scan your phone for the lost data, either "Standard Mode" or "Advanced Mode", if done, click "Start" to go on.
Note: There might be a Superuser authorization appearing on your device during the scan. If you get it, click "Allow" to confirm it. If not, just forget it.