I tried the iOS 14.2 Beta 2 version and it did NOTHING, issue persists. I can not go out with my phone because I don't have reception at all, instead I go out with my old yet reliable Nexus 5X :(

I have a new iPhone Xs Max and out of the box I had connectivity problems. Wifi works just fine but the problem is with my reception as I get ,,No service'' all the time and unable to make calls. I went to Apple store in Frankfurt and they couldn't determine what's wrong, they ran diagnostics and told me that the phone has strong reception and nothing wrong with it but on the other hand I had a chat with Apple USA and they also ran diagnostics and told me that this could be a hardware problem, so I see conflicting opinions by Apple which extremely frustrating. The only solution that seemed to work but still unreliable is to reinstall iOS using DFU mode which made my phone receive signal for a couple hours but then dropped signal, so this means that it not a hardware but a software issue. I am on iOS 14.0.1 and will not update until Apple finally finds a WORKING solution to this miserable piece of technology. It is mostly unstable when 4G is activated in the settings so I have to switch to 3G manually so that I can receive signal which means that I am never getting 4G on this phone. I would still be relatively happy if it worked only with 3G but the signal also drops and I get ,,No service'' and only a restart fixes it which is EXTREMELY annoying and even sometimes a restart doesn't fix it and I am stuck with phone which doesn't make calls, how sarcastic is that! This is the biggest prank ever pulled by Apple on me which left me frustrated with a very expensive USELESS phone so I guess I am never buying an iPhone again!