Micromax A100 is a low budget smartphone that was launched in 2012, August. The phone comes with TFT capacitive touchscreen. If you want to connect your device to a computer, then you need to download the required driver for your device.
Micromax A102 is a well known smartphone providing good features in cheap price. The smartphone is equipped with Capacitive touchscreen. Here you will find Micromax A102 flash file driver along with ADB driver. Just follow the guide.
Micromax Bolt D321 was released in 2015, February with Android OS 4.4.2 (KitKat) installed on it. If you are Micromax D321 user and want the drivers for your device, then you will find official drivers here.