Your phone might support using an eSIM (embedded SIM card), in addition to the physical SIM card. Contact your carrier for details.
If your carrier provided you with an eSIM:
Insert the SIM tool into the tray hole and gently push to pop it out.

Insert (gold contacts up) or remove the card.

If you’re using two SIMs, turn the tray over. Then insert (gold contacts up) or remove that card.

To see if your phone supports two physical SIM cards, go to Settings > About phone > Device details. If you see SIM status (sim slot 1)SIM status (sim slot 1) and SIM status (sim slot 2)SIM status (sim slot 2), then you can use two physical SIMs in your phone.
Push the tray back into the phone.

You may need to erase your eSIM:
When you erase an eSIM, you remove the following capabilities from the phone:
Erasing the eSIM does not cancel your mobile data services. To cancel your services, contact your carrier.
To erase an eSIM:
To restore an eSIM you erased, contact your carrier.
If you’re having problems, try these troubleshooting steps.