I have bought my Galaxy S21 Ultra this month and I am on EE. I am not familiar with the previous issues of the camera system, but nighttime photography is the worst I have ever come across. The levels of noise are very high, the sky has an uneven messy aspect, the moon is just a white spot with an irregular shape. I have tried different lenses, zooming in, night mode on and off. I have cleaned the cache partition on the phone & the cache on the app and I will give it another try this evening. But I am very, very disappointed.