Use APKPure App
Get Micromax Backup & restore old version APK for Android
Allows user to backup and restore data from micromax cloud
Allow user to backup contacts, SMS, call logs, Whatsapp data, Application to Micromax cloud and restore them to another Micromax application. It uses M! Account for credentials management.
The application is already built in many Micromax devices and you can find the application under Settings > Micromax cloud backup.