If you had forget the password/pattern of Micromax Bolt D303 or it has been stuck/hang on logo or White screen appears on booting. Then with the help of combination of keys you can Hard Reset your android device. Follow the steps:
1- Charge your device upto 70 percent.
2- Switch off device.
3- Press & Hold Power + Volume up until menu appears.
4- Now, Press Volume up to enter Recover mode.
5- Android Logo with Red exclamation mark appears.
6- Now, Press Power + volume up for a while, to enter Recover mode.
7- Using Volume key select Wipe Data/Factory reset.
8- Swipe Square key on the bottom right side of screen to confirm.
9- Using Volume keys select Yes-delete all user data and to confirm swipe square key on the bottom right side of screen.
10- Wiping Data starts.
11- Reboot system now using Square key.
12- Formatting has been done and phone is free from pattern lock.