S22 Ultra no network connection (waiting on repair)

I experienced the same issue with my S22 Ultra, out of nowhere on Thursday February 8th. My wife has the same phone, on this network and does not have any issues. On Monday Feb 12, I went to the ATT store; they replaced 2 sim cards and finally used an ESIM. The phone worked while in the store. Later that night I again had no network connection. On Tuesday Feb 13, I went to the same ATT store. They reset the network settings, which I had done several times. They thought the 5G antenna was bad. I took it to a local repair shop. They did not thing it was the antenna because at times it would have connections to the network. The phone worked while in the store. Later that night I again had no network connection. I could use WIFI, but was unable to send or receive texts, calls, or access the internet or use apps. I had connections off and on. On Saturday Feb 17, I went to another ATT store. They reset my network through their computer system, The phone worked normal for several hours, then again, I had no connection. Tuesday Feb 20, I again went to the ATT store, they still had no solution, as I had tried all of the troubleshooting, including a factory reset. I then took it a local repair shop. I explained to him how the ATT store thought it was the 5G antenna. He again didn't think that was the issue. After diagnosing and looking into the matter, he determined that there was not an issue with the antenna. He called my wife's phone and said after some research and calls to other repair associates, that they came to the conclusion that the chip was bad on the motherboard, it cost $200, which it less than I own on this phone and way cheaper than a new one. As of now, I am waiting for the repair and to find out the results.