Hello Michael Bechthold, thank you very much for your post of May 12, in which you say your S 10 does not dim. I couldn't believe this statement at first, so I rummaged through the relevant Samsung forums again.
There was actually often the statement that these problems do not exist with older devices such as the S 10.
So this afternoon I went on a bike ride in full sun for 2 hours using the S 10 +.
In fact, LM 4 did not get darker at any stage.
This obviously means that all devices that are younger than the S 10 series dim and are therefore not suitable for the use of LM 4.
I have therefore decided to stick with the S 10 +. This meets all my requirements (large and bright display, good battery life, SD card slot).