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

Micromax A88 Micromax A88
Micromax Canvas 4 A210 Micromax Canvas 4 A210
Micromax A92 Micromax A92
Micromax A240 Canvas Doodle 2 Micromax A240 Canvas Doodle 2
Micromax A63 Canvas Fun Micromax A63 Canvas Fun
Micromax A67 Bolt Micromax A67 Bolt
Micromax A74 Canvas Fun Micromax A74 Canvas Fun
Micromax A76 Micromax A76
Micromax A113 Canvas Ego Micromax A113 Canvas Ego
Micromax Canvas Tab P650 Micromax Canvas Tab P650
Micromax Canvas Turbo Micromax Canvas Turbo
Micromax A117 Canvas Magnus Micromax A117 Canvas Magnus
Micromax A77 Canvas Juice Micromax A77 Canvas Juice
Micromax A61 Bolt Micromax A61 Bolt
Micromax A114 Canvas 2.2 Micromax A114 Canvas 2.2
Micromax A119 Canvas XL Micromax A119 Canvas XL
Micromax A94 Canvas MAd Micromax A94 Canvas MAd
Micromax Canvas Turbo Mini Micromax Canvas Turbo Mini
Micromax A350 Canvas Knight Micromax A350 Canvas Knight
Micromax A28 Bolt Micromax A28 Bolt