Most of the time while I am away from my home (or.anywhere else that has WIFI that I can connect to) my S22 Ultra will give me an error code on the screen that says"you are.not connected to a network". However, sometimes the phone will show I have signal (but don't), other times it will show no signal. At home, I have to use WIFI & WIFI Calling. I've called support, the steps they tell me do not fix it. The only one that worked for about 15 minutes or so, was to take the SIM card out and then put it back in. We have also replaced the SIM card, but this only fixes it temporarily. Sometimes at home it even shows 5G, but like right now it shows zero signal. I live about two miles from tower, but this is a constant issue wherever I go on the East Coast.