Cellular data issue I need help

Click on the link I posted and follow the guidance in that link. You do know what a link is, I hope.

As a reminder, a link on a web page is a way to open a new page with additional information. A Link is usually shown as blue text, and to open the new page position your mouse cursor anywhere within the blue text (the mouse cursor will turn into an hand) and click the left mouse button.  Let me try to make it perfectly clear:

                                        CLICK HERE

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CLICK HERE—>If you see No Service, Searching, or SOS on your iPhone or iPad<—CLICK HERE

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                                         CLICK HERE

The Related Article above your name on this page, that you were reading just before you posted here, probably has the answer to your question. If the Related Article doesn't provide sufficient information please post back with more details about the issue and another user in this user-to-user forum will try to help.

OK, then this is the support article you need→If you see No Service, Searching, or SOS on your iPhone or iPad

You will need to work with your carrier to resolve this issue.

If you see No Service, Searching, or SOS on your iPhone or iPad - Apple Support