Unlock with Google account
To get into this process, you need to make sure that you set and signed up Google account before your phone was locked.
Step 1: Input any password and the device will alert you to the wrong password five times. Try it again after 30 seconds.
Step 2: Now, you will see “Forgotten the password” option. Input Google account and password and you can easily unlock your device.
Note: Your phone must be connected to the Internet before you can log into your Google account.
Use Android data recovery software
You can use a good Android recovery programme to rescue all data from the inaccessible Android device. This tool can easily get back data like videos, photos, music, application files, etc. in simple mouse clicks. It can also rescue data from almost every Android phone and Tablets. It uses the effective strategies to retrieve files from your device along with its external memory device.
Install and launch Android Data Recovery on your system and then connect your Android phone or Tab with the PC via USB cable.
Set up Android to enable USB debugging. Three different modes are provided to different Android users using the different operating system. You can select the mode as per your device operating system from the list bellow;
Android 2.3 or earlier: Enter “Settings” < Click “Applications” < Click “Development” < Check “USB debugging”