How to fix my cellular issue data on my iphone 11

Hello,

Please make sure that the cellular icon appears green in the Control Centre as shown in this image.

If it already is or cannot be enabled, refer to this ----> Cellular Update Failed No Service Signal … - Apple Community

Hope that fixed your issue 🙂

Hey,

I had this issue as well. Do you use an eSIM?

After contacting my carrier, they had me try it with the physical SIM instead—if you don't have one, order one from your carrier. Try it with a physical SIM. Though Apple had said it was a hardware issue, my carrier concluded it was the eSIM (embedded SIM) in the phone that had broken. Unfortunately, I must keep it on the physical SIM, but this solution restored service to me and helped me avoid a pricey repair.

This may help --> Cellular Update Failed No Service Signal … - Apple Community