Same thing happened to my wifes iphone a few days ago.
She was using it without data plan and with carrier data blocked for over 5 months now and she got the same text and they automaticly added the data plan to her account.
You can stick your sim in a regural nonsmartphone and then call them and maybe remove it. But they might add it again later.
AT&T is getting more agreesive latelly enforcing this that they havent been doing for years now.
Not much you can do I guess besides take your number and iphone to Tmobile or something.
She was using it without data plan and with carrier data blocked for over 5 months now and she got the same text and they automaticly added the data plan to her account.
You can stick your sim in a regural nonsmartphone and then call them and maybe remove it. But they might add it again later.
AT&T is getting more agreesive latelly enforcing this that they havent been doing for years now.
Not much you can do I guess besides take your number and iphone to Tmobile or something.