I'm looking for a good Samsung or Huawei cell phone, up to 300 euro
It should have good camera quality and sound.
So I have the Huawei P20 Lite and am more than satisfied, but it is probably already too 'old'.
Give it a try with the Galaxy A series 40/50 …
I have the Huawei P30 Lite and think it is very good.
The Honor 20
Camera mediocre.
If you only wait for the MP, then yes - if you see pictures - probably no.
Are you looking for a super camera - is Huawei far ahead - but is it just about the snaps or should everything be right in terms of price / performance?
At Huawei, I don't know much, but I can give you tips about Samsung. In the price range, the new A-Class from Samsung is perfect. Not high end but not bad for the price. In the following link you can still read through officially at Samsung. Good luck with searching