How to force a factory reset or hard reset on Micromax devices

Micromax Canvas Nitro 2 E311 Micromax Canvas Nitro 2 E311
Micromax Q391 Canvas Doodle 4 Micromax Q391 Canvas Doodle 4
Micromax Canvas A1 AQ4502 Micromax Canvas A1 AQ4502
Micromax Canvas Knight 2 E471 Micromax Canvas Knight 2 E471
Micromax Canvas Tab P690 Micromax Canvas Tab P690
Micromax Canvas Sliver 5 Q450 Micromax Canvas Sliver 5 Q450
Micromax Canvas Selfie Lens Q345 Micromax Canvas Selfie Lens Q345
Micromax Bolt S301 Micromax Bolt S301
Micromax Bolt D303 Micromax Bolt D303
Micromax Canvas Xpress 2 E313 Micromax Canvas Xpress 2 E313
Micromax Canvas Selfie 2 Q340 Micromax Canvas Selfie 2 Q340
Micromax Canvas Selfie 3 Q348 Micromax Canvas Selfie 3 Q348
Micromax Canvas Nitro 4G E455 Micromax Canvas Nitro 4G E455
Micromax Canvas Spark 2 Q334 Micromax Canvas Spark 2 Q334
Micromax Canvas Juice 3 Q392 Micromax Canvas Juice 3 Q392
Micromax Canvas Blaze 4G Q400 Micromax Canvas Blaze 4G Q400
Micromax Canvas Fire 4G Q411 Micromax Canvas Fire 4G Q411
Micromax Bolt S302 Micromax Bolt S302
Micromax Bolt Q331 Micromax Bolt Q331
Micromax Bolt Q338 Micromax Bolt Q338