Design detail about Mate 30 Pro leaked
At this point in time, it might be too early to start speculations about the Huawei Mate 30 series since the Mate 20 Pro has just been released this October. However, we do have some renders of a case for a new Huawei smartphone that Huawei themselves have patented. It was patented in China with the CNIPA (China National Intellectual Property Administration).
We assume that this patent has nothing do to with the upcoming P30 series that is bound to be unveiled in H1 2019. This is based on the previous design choices made by Huawei where they have placed the cameras on their P phones towards the corners whereas this case has a huge cutout on its center portion - much like the other Mate series devices.
There are some interesting things that may be inferred from these renders. First, the cutout for the camera is much larger compared to the one found in the Mate 20 Pro. This may suggest that the new Mate phone will have 5 camera sensors - there is plenty of room to place two new sensor in there.
Another interesting thing about these renders is the cutout at the top of the phone. Huawei ditched the 3.5mm headphone port, so we're baffled as to why they have decided to cut the case up there. One possible explanation is the IR blaster, which might be the case, however if not, we may have something completely new coming from the Chinese giant.
Lastly, at the very top of the front side of the case, we can see a very small cutout where the call speaker will be placed. This suggests that the front facing camera of the Huawei Mate series will be placed inside an Infinity-O type display. There is also a possibility for some sort of water-drop notch, however, Infinity-O is more in line with recent display design trends.