New phone not connecting to 5g

[Ginaup718]

I just purchased a S21 and it is only showing 4g connection. I have mobile data turned on, I'm using the new sim card and my husband's phone connects to 5g just fine sitting right next to me. Any ideas?

[vzw_customer_support]

With all we do on our phones it is essential that they connect to the best possible signal at all times, Ginaup718. Thank you for the details. Does your husband also have an S21? When and where, aside from the time you mentioned, does this happen? -George