***Resetting the device via recovery mode:***
# Turn off your phone and wait a few seconds.
# Press and hold the Volume Down and Power buttons until you see the Android logo.
# Wait a few seconds.
# Navigate with the volume buttons to 'Wipe data/factory reset' and confirm with the Power button.
# Navigate to Yes and confirm with the Power button.
# Your device will now be reset[br]
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(Source: https://www.gomibo.ie/samsung-galaxy-m11/tips-tricks/reset-via-recovery-mode)