I've had an s20 Ultra for a week and I have had some issues with mobile connectivity. Whilst at work in the office I cant get 5g only 4 but this isn't an issue for me. when I go outside I can get full strength 5g but my connection is awful, try to watch videos or play an online game is terrible, it's like having dial up. I was trying to play a golf game but kept saying connection was unstable. I went into settings and turned off 5g and the problem went away. I done a speed test yesterday and got 70mb on 4g and only 35 on 5g which suggests there is an issue. Any ideas please ?