: You cannot use part03.rar by itself. You must download all parts (Part 1, Part 2, etc.) and keep them in the same folder.
If you are trying to repair or update your Micromax device, the process generally follows these steps: Download MICROMAX L50CANVAS Firmware USB part03 rar
: Most Micromax phones use MediaTek chipsets, which require the SP Flash Tool . You will need to load a "scatter file" from your extracted folder into the tool to begin the installation. How to Extract Multiple RAR Files at Once on Android Easily : You cannot use part03
: Ensure you have every segment of the archive. You will need to load a "scatter file"
: Once extracted, you will typically find the Stock ROM , which includes the operating system, drivers, and recovery tools needed to fix a "bricked" or malfunctioning phone. How to Use This Firmware
: Use a tool like WinRAR on the first file. For mobile extraction, apps like ZArchiver on the Google Play Store are highly recommended.