Depends on the device. This could be done (with some hackery) on Sony Xperia phones from several years ago, but more recent ones will brick if you try it. I th

Depends on the device. This could be done (with some hackery) on Sony Xperia phones from several years ago, but more recent ones will brick if you try it. I think Google's Pixel phones will let you re-lock, but my impression is that most devices are in the latter category.