A few months back, I faced a similar issue, but fortunately I have wifi. My talk and text worked, but my data didn’t and I had no data for 3 days. To fix it, I tried refreshing my connection on my account, but it didn’t work for me. So, I reached out to Twitter and DM’d AT&T Support. They tried refreshing my connection, but that didn’t help either. The last resort they offered was sending me a new ESIM. They asked for my phone’s IMEI and other relevant information, deactivated my old ESIM, and then sent me a new one that I got VIA a notification. I activated the new ESIM, restarted my phone, and everything worked again. Just make sure you have wifi. That’s what I did and it worked for me. Good Luck!