Currently, Samsung's highest-res mobile camera sensors are reserved for flagships such as the Galaxy S23 Ultra (and specialized mid-rangers such as the Redmi Note 13 Pro and Pro+). However, the OEM is supposedly working on something with approximately double that spec.
Samsung has been said to have mobile device image sensors with resolutions of 400MP or more. Now, their most detailed leak puts that figure at 432MP, which belong to both the ISOCELL HW1 and HW2. According to the leaker @Tech_Reve, they will also be 1-inch sensors - well, very nearly, with footprints of 1/1.05 inches and 1/1.07 inches respectively.
The HW1 will also apparently have pixels of 0.56 microns (or µm) in size, while those of the HW2 will be even smaller at 0.5µm. Accordingly, should they truly exist and launch in the next few years, Samsung might tout them as capable of delivering the best giant cat poster-class images at the finest detail yet.