Micromax Q4251 Android 6.0 Firmware Flash File

Prerequisites for Installing Rom on Micromax Q4251

Download and install Lenovo Downloader Tool and Qualcomm USB Drivers for
Turn off the phone. Hold Vol+ button and plug-in USB Cable. The phone will vibrate one time; the screen will be black. It’s Download Mode.
There should be the device called in device management:
Qualcomm HS-USB QDLoader 9008 (COMXX)
In any other case, you have to install drivers manually.
Run Lenovo Downloader Tool
Click Browse in Programmer Path and choose prog_emmc_firehose_8916.mbn
Load XML in Download Section:
First select RawProgram File: rawprogram0.xml
then Select Patch File: patch0.xml
Check all inputs is correct and click Download under Load XML button and wait about 5 to 10 minutes:
After flashing process starts, it might take up to 5-10 minutes. So keep patience and wait