In order to hard reset a Micromax A25, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Micromax A25 device will be brought back to the default configuration of a brand new device.
1. Turn off the phone by holding down the Power button.
2. Now press the Center, Power and Volume Up buttons until you see Recovery Mode.
3. Choose the wipe data/factory reset. To do that, use Volume to select the option and Power to confirm it.
4.Lastly, select the Yes, delete all user data and Reboot System Now.
5. Good job, you have completed the hard reset process.