Galaxy Tab S10 Ultra 5G Issues

I recently received my s10 ultra , and after transferring my sim card from my old S4 tab , oddly I'm able to make calls and receive calls , but I can't seem to get the USSD codes to work. I kept getting the same error code "Connection problem or invalid MMI code" , I've tried the whole soft reset , turn on and off airplane mode and etc but to no avail. I decided to switch it back to my Tab 4 again and all's functioning well.

Is anyone else having the same issue?

Also there seem to be a weird alignment issue with certain apps. Where things overlay each other or the icons are out of place. :/ Please let me know if you guys are having any similar issues. I dread to think I received a faulty tab... Samsung has been very unhelpful so far. Because of this I think this will be my last deal with samsung. I rather just go apple , I did not get issues like this with my ipad pro. To think it's riddled with issues for a flagship tablet. I'm so disappointed.