Face unlocking code of Vivo mobile phone with mask

After wearing the mask, you can still unlock the phone through facial recognition ~ because the facial recognition function is to collect facial information through the front camera, compare it with the input facial data, and the facial feature points can be matched to unlock it. After wearing the mask, some facial feature points can still be matched successfully, so they can be unlocked. It's not that the phone is not working properly. Please feel free to use.