Qualcomm CPU or Chipset can be flashed using QPST tool. Stock ROM comes in MBN extension.
QualComm CPU Flashing is carried out in two phases:-
1- Driver Installation
2- Software Upgrade
Driver Installation:
1- Download and install Qualcomm driver. While installing driver avoid using cable for successful installation.
2- After installation, connect Phone to PC using USB cable.
3- While connecting to PC, phone should be switched off and press volume up & down as boot key.
4- If it makes Qualcomm port, then driver has been successfully installed.
Qpst Tool v2.7.453.0 (Latest Version): Download
Software Upgrade:
1- Download the QPST tool & driver.
2- Make sure your device has the Power to support flashing.
3- Run QFIL tool.
4- Click on Browse under the Programmer path to select MBN File.
MBN File Format:
5- As soon as the MBN file is selected, Select Build will automatically select the Update or Stock ROM.
6- Click on Load XML, select rawprogram_unsparse_without_qcn.xml and then choose Patch0.xml
Load XML comes with two option:
a- rawprogram_unsparse_without_qcn.xml : On choosing this file, data will not be lost.
b- rawprogram_unsparse.xml : Will lose RF Calibration data, IMEI and WiFi/Bluetooth Address.
7- Switch off the device and connect it to PC by pressing Volume up & down key.
8- Click on Select Port and choose the port.
9- Click on Download to start flashing.
10- Unplug USB cable, when Finish Download appears.
Note: Do not unplug cable when Reset Phone or waiting for Reset Phone is in the process.