Data Stopped Working - iPhone 13 Pro Max

So I have had the 13 pro max for about 3 months. I first started noticing that I had to power down my phone then power it back on to get connected to the internet. Then it started switching from LTE to 5GUC about a month ago. And just over 24hrs ago, my phone suddenly stopped working period. Can't use any of my entertainment apps (Netflix, Prime Video, YouTube,etc...) without being connected via WiFi. I spent over an hour on the phone with a tech and they did a few things but problem still exists. I wiped my phone clean and started from scratch and still the problem exist. I was told to contact T-Mobile and have them set me up with an eSim. I was then told if that doesn't fix the issue, reach back out to apple and they would have me bring in the device for service. 🤔Call me a conspiracy theorist, but I personally think not enough people upgraded to the 14 and they are losing money and want people to upgrade to the newer device. The 13's were being designed during chip issues during covid and maybe me and plenty of others received a bad phone