It's just beyond frustrating that my iPhone 11 Pro Max has the worst cell phone reception of any iPhone I've owned in the past 10+ years. I make it a point to tell everyone, all the time what a miserable device it is. My wife's iPhone 6 always has great reception where my iPhone 11 Pro Max is incapable of making a call, streaming music or sending an email. My kids have taken to calling my iPhone my iCamera because that's the only thing good about it.
My understanding is that it's a hardware/design issue due to the modem chip that it has. I hope this is changed in the next generation iPhone.
It has a terrible handoff between cell signal and WiFi too which compounds the problem. I have Apps like Pandora that constantly says the device is offline because I am in my car and the cell signal is poor and of course there's no Wifi.
Oh one other funny side-note when I brought it to Apple when this initially started the Genius there mentioned about how terrible cell reception was on the iPhone X. So We shouldn't be so naive to think Apple isn't abundantly aware of this issue, but just incapable of fixing it until hopefully the next generation.