To hard reset the Tecno F1, follow these steps:
1. Power off your device by holding down the power button and selecting Power off from the menu that appears.
2. Once your device is turned off, press and hold the volume up button and the power button simultaneously.
3. Keep holding both buttons until you see the Tecno logo appear on your screen.
4. Release both buttons and you will enter recovery mode.
5. Use the volume buttons to navigate through the options in recovery mode and select Wipe data/factory reset.
6. Confirm your selection by pressing the power button.
7. Your device will now begin to reset, which may take a few minutes.
8. Once the process is complete, select Reboot system now to restart your device.
Please note that performing a hard reset will erase all data on your Tecno F1, so make sure to back up any important files before proceeding with these steps.