"Your iPhone is currently unable to access cellular data"

Try the steps outline here:

-> If you see a Cellular, Ultra Wideband, or Apple Pay Issue message after an iOS update or restart - Apple Support

If these do not solve your issue, I'd speak directly to an Apple Support representative. This is a user-helping-user forum.

Contact Apple Support:

| Call Apple Support 1-800-APL-CARE

| For International Numbers or ASL support, click here:

| Contact Apple for support and service - Apple Support

|

| Chat with Apple Support

| https://getsupport.apple.com/solutions/chat

|

| Get Started Online

| https://getsupport.apple.com/

ʘ‿ʘ

As a heads up: your phone should be no greater than 4 years old from original iPhone 7s purchase date in order to qualify for this program.

based on your iPhone model ( iPhone 7) there are a repair program for “No service “issues, check this article to see if your iPhone is covered by this program ☞ iPhone 7 Repair Program for "No Service" Issues - Apple Support

Welcome to the Apple Support communities,

based on your iPhone model ( iPhone 7) there are a repair program for “No service “issues, check this article to see if your iPhone is covered by this program ☞ iPhone 7 Repair Program for "No Service" Issues - Apple Support

if your iPhone isn’t covered check related article again to learn what you have to do to fix this issue ☞If you see a Cellular, Ultra Wideband, or Apple Pay Issue message after an iOS update or restart - Apple Support

Regards!

Thanks for letting me know about that, I didn’t notice that point ㋡!