To perform a hard reset on the Tecno Spark 20 Pro, follow these steps:

1. **Turn off the phone**: Make sure the device is completely powered off.
2. **Enter Recovery Mode**:
- Press and hold the *Volume Up* button and the *Power* button simultaneously until the Tecno logo appears.
- Release the *Power* button when the logo appears but continue holding the *Volume Up* button until you see the recovery mode menu.
3. **Navigate the Recovery Menu**:
- Use the *Volume Up* and *Volume Down* buttons to navigate through the options.
- Use the *Power* button to select an option.
4. **Select "Wipe data/factory reset"**:
- Navigate to "Wipe data/factory reset" and select it using the *Power* button.
- Confirm the action by selecting "Yes" and pressing the *Power* button again.
5. **Reboot the Device**:
- Once the reset is complete, select "Reboot system now" using the *Power* button.

The phone will now reboot, and it should be restored to its factory settings. This process will erase all data on the device, so ensure you have backed up any important information before proceeding.