Mobile data doesn't work on my phone . I can only connect to wifi

• If you already contacted your cellular carrier, checked your plan, checked your SIM card and everything is OK on their side
• If you already tried (to no avail) all the steps provided in the support article that led you here

I suggest that you 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.

First check if Cellular Data is activated:

Settings → Cellular → enable Cellular Data

If you are roaming on another network, it is possible that your plan with your Carrier does not support it, or you must go to: Settings → Cellular → Cellular Data Options → enable Data Roaming.

If you use eSIM, check if the line is open, go to:

Settings → Cellular → enable Turn This Line On

You have checked your SIM card, you have checked whether you have a connection to your Carrier - check the upper bars next to the battery and Wi-Fi icon. Remember when you restart or update your iPhone, you must enter the PIN code for your SIM/eSIM before you can connect to your Carrier network.

Alternatively, contact your Carrier. There may be challenges either with their network or your Plan.