Any tool you use the process is almost the same, download stock rom or firmware, extract the rom.
1. Power the phone to fastboot mode.
2. Look up to get the details about the phone.
3. Use the details and search google for the rom.
4. You can download the rom anywhere but ensure the the specific.
5. Download latest MTK USB driver from here.
6. Download SP Tool or Miracle Box crack from here.
7. Install MTK driver and Open sp tool or Miracle crack.
8. Open the Tecno ROM you downloaded earlier and extract.
9. Open SP Tool and select your scatter file.
10. Connect your phone to computer and write the program.