Hard Reset on OnePlus 5T

How to Hard Reset on OnePlus 5T 5?

Make sure you turned off the device.
Hold down the Volume Down key and the Power button.
Wait until the OnePlus logo appears and then release the keys.
Choose your language using the Volume keys and the Power button.
Then select "Wipe data and cache" using the same keys.
Press "Erase everything" or "Reset system settings" and confirm to complete the process.
Tap "Reboot" to turn on the device.
That's all! After these actions, the data on your device will be deleted.