Micromax A091 Stock Firmware (Flash File) he Firmware File (Flash File) will help you to Downgrade, Upgrade or Just re-install the Stock Firmware on your Mobile Device. The Flash File (ROM) also helps you to repair the Mobile device, if it is facing any Software Issue, Bootloop Issue, IMEI Issue, or Dead Issue. File Name: Micromax_A091_4GB_20140505_DFU.zip File Size: 462 MB Flash Tool: DFU Flash Tool How to Flash (install): Follow Tutorial Mirror 1 (Free)Mirror 2 (Paid)