Here you can download Official SD Update Stock Firmware for the Micromax A56 Android device. The downloadable file High Compressed in an archive, You will get the Flash File after extraction. It contains Firmware and how-to Flash manual instructions.
[*] Chipset: MediaTek MT6573.
[*] Driver: MTK USB Driver.
[*] Flash Tool: Smart Phone Flash Tool.
[*] Firmware Type: Factory Update / OTA.
Firmware for Micromax A56
Build Number: LQAEB19.1.2_W121127
Android Version: v2.3.5 (Gingerbread)
Download Size: 115 MB
[*] Backup: During the flashing process Firmware installation process will erase user data from the phone. So you need to backup for restoring those files on your device.