My iPhone data is not working

If you're sure that everything is okay with your cellular carrier (traffic plan payment, signal coverage in your area, etc.), and if you already tried (to no avail) all the steps provided in this support article:--> If you see No Service, Searching, or SOS on your iPhone or iPad , specifically the section "Reset your Network Settings", I recommend that you contact Apple Support directly, using this link:--> Contact Apple for support and service , or. even better, make an appointment (*) and have your device inspected at an Apple Store or AASP (Apple Authorized Service Provider) among this list:--> https://locate.apple.com/choose-country-region . After checking it out, they'll give you all the available options.

Regards

Giulio

(*) You can do it:

• Online:--> Genius Bar Reservation and Apple Support Options - Apple;
• Contacting a local Apple Store or AASP among the list provided above;
• Using the "Apple Store" app, available and downloadable from AppStore.

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