>>holding onto a call in a bad signal area has nothing to do with reception, it is the transmitter on your phone that is the limiting factor. Think about it: a massive cell tower with mega-watt power vs. the tiny battery operated device in your pocket...
So that said, there are many factors such as tower activity, weather, environment and materials around you, and so on. The phone is the last factor I would consider in that equation.<<
I understand this but;
1 - not all receivers and antennae are created equal and this can indeed become a factor when the transmitter isn't exactly close at all to the receiver.
2 - You are dismissing the possibility of the tower perhaps being located remotely.
What you are saying is like saying "the local TV transmitter being 75 miles away should provide just as good performance on my TV set whether I use a long range antenna on the roof, or use a pair of rabbit airs on the TV set itself.
When using an app such as Cellmapper (not available for iphones) or when looking at the signal strength using the service menu on an iphone, one can see what the actual signal strength in dbm is. There is a pretty big variation between phones and from what I have seen in the phones I have owned over the years, the Androids always have better results. I can see a reading of say -100dbm on an Android and at the same spot see -120dbm on an iphone (or for that matter on an Android with poor reception capabilities). At -120dbm, any phone will struggle to maintain the call.
That said, I much prefer iphones but have always gone back to Android after using them for a bit because of this situation. Many have said the iphone antennae are just not as good, and others have said the Intel modems are a factor. I'd just like to know if the iphone 11 is anything of an improvement or not.
Aside from all this, based on your response about the transmitter in the phone being the limiting factor, I'd still ask the question...how well does the 11 stay connected to a tower and how good is the call quality compared to the Xr or Xs in very bad coverage areas?