These are instructions on how to Restore the QCN file on Qualcomm Devices using the QFIL Flash Tool.
Requirements: You need to have a Qualcomm Device to restore the QCN File. Restoring QCN will not work on the devices having Chipset other than Qualcomm.
Congratulations! You just learned to restore the QCN File on the Qualcomm Devices.
[*] The above can be used to restore the QCN file on Xiaomi, Vivo, Oppo, ZTE, OnePlus, and other devices having Qualcomm Chipset.
[*] Enabling Diag Mode: Above we have shared three codes, i.e., *#*#13491#*#*, *#*#717717#*#*, and *#*#717717#*#. These three codes can be used on Xiaomi Devices to Enable the Diag Mode. To Enable Diag Mode, you may have to enter the correct Diag Mode code; for example, if you have Vivo devices, you have to Dial *#558# in Step#7 to Enable the Diag Mode.
[*] Credits: QPST Tool is created and distributed by Qualcomm Mobility Inc. So, full credit goes to them for sharing the tool for free.