I am repeatedly experiencing a complete lack of connection. While my iphone XS max shows as having all 4 bars, I can't get a single text to go through, nor can I use any apps that require internet access, including just pulling up a page in Safari. I have tried EVERYTHING. I've reset my network settings multiple times, toggled MMS messages and iphone messages, updated to the most recent version of iOS, removed and reinstalled sim card, and NOTHING fixes this.
I am able to get phone calls through, but everything else is not working. I am highly dependent on my phone for my job, so either this gets fixed or I take my money to ATT.