How do i unlock my iPhone while using face mask?

By typing in your passcode.

I believe the latest update has a way of unlocking it using the apple watch if you are wearing a facemask. But this is obviously only useful if you have a recent apple watch.

I don't, so I'm getting quite quick at putting my passcode in 🙂

You will need to enter your passcode.

Face ID can't be used with a face mask on.

You must enter the passcode.

So unless you have a Apple Watch then you can unlock your iPhone.

But other than that you can just enter your passcode.

I just pull it down momentarily.

If your phone detects you are wearing a mask and you have the latest update it should immediately display the keypad so you can enter your passcode.

The latest update is iOS 14.4.2. It does not include the unlock with Apple Watch feature. That is rumored to be coming in an update yet to be released.