According to the latest rumours, the 2021 iPhone 13 range will retain the iPhone 12's flat edge design language, but will decrease the size of the 'notch' thanks to a change in position of the top receiver. It will also be around 0.26mm thicker.
In addition, the camera bump will be just as thick but will have a small change to its appearance. According to rumours, Apple will add sapphire glass to the lenses to make it look like a single camera unit as opposed to the more exposed design it now sports.
It is likely the same camera setup will appear on the iPhone 13 models as the bump remains the same size.
According to further reports the new range of handsets will be called iPhone 13, and suggests that the two Pro models will sport Samsung made 120Hz OLED panels.