Subject - About SIM

Hey,

I have received message regarding SIM i.e. "Mobile data update failed and I'm not able to make or receive calls."

Any solution for this ?

Note:

1) I have iPhone SE (1st Generation )

2) I have updated my mobile with latest IOS i.e. 15.5

3) Tried with other SIM putting in my iPhone but still no luck.

4) Went through lot of other solutions available on google but no luck so far.

Can you please revert back ASAP as my I'm not able to make or receive call from last more than 7 days.