What is the best solution for front-facing cameras in full-screen mobile phones? Hole-hole screen, notch screen, waterdrop screen, pop-up camera, under-screen camera?

Currently, I feel that lifting is the most beautiful, but it also increases the thickness of the phone, and it is difficult to deal with waterproofing, dust, etc., so it has been abandoned. Holes are the next best thing. A single hollow in the center is okay, but the pill shape is unbearable. The bangs are because there are many sensors, such as 3D face scanning, which is definitely not possible with a single camera. The under-screen display is too immature now. After watching the Xiaomi one live, I had no desire to buy it. So at this stage, I feel that Android is the best to have a single cutout in the drama, but don’t dig too much. Samsung s21 is just right. For Apple, you have no choice, only bangs.