To hard reset an Infinix Smart 2 HD, you can follow these steps:
Method 1:
Power off your Infinix Smart 2 HD by holding down the Power button and selecting "Power off".
Once the device is completely off, press and hold the Volume Up button and the Power button simultaneously until the Infinix logo appears.
Release both buttons when the logo appears.
You'll enter the Recovery Mode menu.
Use the Volume buttons to navigate through the menu and select "Wipe data/factory reset". Use the Power button to confirm your selection.
Confirm again to start the process.
Once the reset is complete, select "Reboot system now" to restart your device.