I posted the following on reddit and fixed data issues.
“Upgraded to Android 10 on my Samsung Galaxy Note 9 - cannot get data, calls and text seem to be working and can get internet via wifi”
Also, I noticed that many calls started going straight to voicemail (phone didn’t notify me that I had missed calls).
I thought everything was resolved after inputting APN settings as that seemed to resolve the data issues. However, I missed several calls this morning and text messages arrived late. Any solutions?