Leaked Huawei Mate 30 Pro promo image shows a quad camera on the back

A Huawei Mate 30 Pro promotional image has surfaced, offering another look at the circular camera island on the back. Despite what renders from case makers have been showing, the phone will have four rear cameras, not three. Three cameras made sense - P30's square island is home to three cams and a flash. However, this image shows that the LED flash will migrate to the side (case renders showed a vague sensor or speaker grille here). But what will the fourth camera do? The Huawei P30 covered all the bases with an ultra wide, wide and tele camera. Additional info suggests that this will...