Hi,
I've been experiencing the same issue with my A52s. The bottom half of the screen was flickering in a manner quite similar to what the picture in the original post shows. This flickering seemed to coincide with situations, when the signal was low (edge). I did not realize it as I live in a big city which is covered well by LTE/5G, but the symptoms started when I was travelling to other areas with low signal. I noticed it especially when using Google Maps for navigation in my car.
Now my service story:
I bought the phone in December 21, brought it to customer service with the issue in, I believe, Jan '22. The customer service in a Samsung brand store tried to convince me that the issue was my fault and that I had broken the screen. Upon my remark that the screen is obviously not broken as there are absolutely no signs of it on the glass (the phone was almost brand new back then) they claimed that nonetheless they won't cover it and that I might have broken the screen in an "invisible way". After my loud protest in the middle of the brand store towards the store manager I was directed to another service. There, the phone was accepted for repair without further discussions. I received it back after some days with the information that the screen had been replaced.
For some months it seemed that the issue had been solved by that, but last month, when I was again in an area with low signal, the flickering re-appeared, however, as it seems, not as frequently. Bottom line: the issue has NOT BEEN SOLVED. I'm tired of it and probably won't go to the service again, as the phone works all right in my area, but I'm disappointed by Samsung. I switched back to Samsung from another phone brand, because I wanted a reliable device. I did not get it and the issue has not been addressed by the company, judging by the previous posts.
