Update | Huawei reportedly trademarks atypical new P-series smartphone names
UpdateUpdate: It is now claimed that Huawei's new naming scheme for P-line devices goes not merely up to 500, but over 900 too. The OEM has reportedly trademarked 5 additional names - P600 to P1000 in increments of 100 - with the EU and UK intellectual property offices.
Many smartphone fans may be aware that Huawei typically releases 2 flavors of flagship: the camera-centric P series, and the slightly more rounded Mate line. Therefore, we are used to release events that launch phones with names such as P30 Pro. However, it now seems that the OEM is planning to deviate from this trend in the future.
LetsGoDigital claims to have found new trademarking applications, made to the UK and EU intellectual property authorities, for new smartphone names that start with a P, but do not end as may be expected by now. There are 3 of these: P300, P400 and P500.
Therefore, it looks like the P30 series' successors will adopt these names. On the other hand, there are no additional applications for Pro variants. Accordingly, it is also possible that these new alleged trademarks are for the future of the P line's more mid-range iterations.
These phones tend to have vastly different names (that can be slightly convoluted besides) from region to region: for example, the P Smart Plus (2018) is also known as the Nova 3i in some countries. Thus, it may be that these new terms are intended to make certain product names constant across markets going forward.