There are still about three months, the Huawei P30 series is about to be born, the Internet has been rumored to be suspected Huawei P30 Pro and P30 Back Case renderings.
New Back Case Renderings suggest P30 will host three rear camera and P30 Pro host four rear camera.
Take A look at it.
Huawei P30 Pro Back Cases
Huawei P30 Back Cases