• First of all save all your personal data (SMS, contacts, applications, settings, documents, music, photos, etc.)

• Recharge your smartphone battery(more than 70% battery)
• install MTk USB drivers on your computer, Usb driver here
• Download the Stock firmware on your computer

Also Check: Tecno POP2 B1P Fimware [Stock ROM ]

 After make list requirements>>> 
NOW YOU WILL
No1. Run Flash_tool.exe:

No2. Click on Download Agent, find and locate where the download agent File (it should be in the flash tool folder) and press Open.

No3. Click on Scatter-loading, find and locate the Firmware  Scatter File and press Open.

No4. Now click on Download button.
With Turn off your device.
Remove the battery (if removable)
Remove Sim card and SD card to prevent data loss
Connect your phone to your computer via USB cable.