Here's how you can perform a hard reset on a Nokia C1 Plus:

  1. Turn off the phone: Press and hold the power button until the "Power off" option appears, then tap "Power off."

  2. Enter recovery mode: Press and hold the Volume Up and Power buttons until the Nokia logo appears, then release both buttons. You should see the recovery mode menu.

  3. Wipe data and cache: Use the Volume Down button to navigate to "Wipe data/factory reset," then press the Power button to select it. Confirm your choice by selecting "Yes" using the Power button.

  4. Reboot the phone: After the reset is complete, navigate to "Reboot system now" using the Volume Down button, then press the Power button to select it. Your phone will restart and boot up as a newly-reset device.

Note: Performing a hard reset will erase all data, including contacts, messages, and personal settings, so be sure to back up any important data before proceeding with the reset.