The firmware v4.3.28 is indeed released by R&D, but it is only used for factory production and not to the public.
Compared with v4.3.25, no new features are added.
You can continue to use v4.3.28, v4.3.25, or v4.7.2.
The firmware v4.3.28 is indeed released by R&D, but it is only used for factory production and not to the public.
Compared with v4.3.25, no new features are added.
You can continue to use v4.3.28, v4.3.25, or v4.7.2.