I want to update data cellular

Contact your carrier for any changes to your cellular options.

Your issue has nothing to do with the subject of this thread. Please click Ask the Community at the top of this page and create a new post.

I mean you POSTED IN THE WRONG PLACE. Click Ask the Community at the top of this page and ask your question again there:

it Showing download and install but I can’t click it why ?

and it asking me to connect to WiFi which I did and it won’t still allow me to click on the download and install

I don’t get it what do you mean