can you switch off eSIM's to go to oh cellular card?

445ulu wrote:

How do you get your carrier Sims card to reactivate after switching off eSIM

You'll need to contact your carrier to begin using a physical SIM card again.

To delete an eSIM from your device,

1. Go to Settings.
2. Tap either Cellular or Mobile Data.
3. Tap the plan that you want to erase.
4. Tap Delete eSIM.

You can learn more here: How to erase the eSIM on your iPhone - Apple Support