Just to further update. I have a 12 Pro and I was having an issue since IOS 14 whereby I was losing my data connection sporadically to the network. Once spotted, I had to toggle flight mode to reset. Since I downloaded and installed 14.3 beta, the issue now seems to have been completely resolved. Been more than three days and there has been no repeat of the issue. It was happening a couple of times a day.

I have an Iphone 12 Pro. I was experiencing a cellular issue since IOS 14 came along, whereby I was dropping off the network even though 4G on one bar was still showing. Had to toggle Airplane mode to reset. However, I downloaded and installed IOS 14.3 in beta about 40 hours ago and haven't had the problem appear since. Seems (fingers crossed) to have resolved it. I gather there is an modem update contained in 14.3. I have never downloaded a beta version before but the problem was annoying me so much, I felt it was worth rolling this dice this time around.

It is obscene that Apple has not address this issue yet. It's clearly impacting many thousands of people. I have had the issue on my Iphone XS (once I downloaded IOS 14) and now on my IPhone 12 Pro also. And I've tried absolutely everything but nothing works to remedy. And Apple are just ignoring the issue.

I have a lot of connectivity issues since I downloaded IOS 14. I had an XS and now have a new 12 Pro. On both phones, once IOS 14 came along, I experienced the issue of the signal from my carrier sporadically going down. It looks like I have one bar of 4G, but in actual fact the phone is dead. This happens every few days. Once I spot it has happened, I can get rid of the problem by toggling Airplane mode on and off. It's extremely frustrating though and I see many others are experiencing similar issues online. I was hoping that IOS 14.2 would fix the problem, but it persists. I've had Iphones for many years (since the start) but this is the first time I have ever experienced such a problem. I have tried EVERYTHING from resetting my network settings to restoring my phone completely. None of these possible solutions work. Now, as I type, my phone is no longer reliable. It's capable of just suddenly dropping the signal (even though one bar of 4G is always visible) and the only way I find out is when I attempt to use the phone. Extremely frustrating.