You need a file explorer like FExplorer which you can download from here.
How to Unlock MMC card:
Insert card into your phone but don't access it through phone.
- Run FExplorer and Open the path C:\system.
- You will find a file called mmcstore ,rename the file mmcstore.txt
- Copy that file(mmcstore.txt) to your pc and open that file in notepad.
- You will find your password in that file.
