iPhone 11 Pro Max 512 - Verizon
I've had it since day one of the launch and it's been great, until last week (October 24th).
I can have 4 bars and can't make a call. It just shows dialing, but no dial tone, then call failed.
Or I will have three bars and I can hear who I'm speaking with, but either they say I'm breaking up or they can't hear me at all and they hang up.
I call back and it won't go through again.
It goes from four bars to one to none in highly populated areas where I have never had an issue with any of my past four iPhones.
I went to the Genius Bar today and they ran diagnostics stating I had only 8 calls in my past 100, but they were all three days ago, Oct 25th! They 'reset software'. Next step factory reset the phone if necessary. Next step replace SIM cards if necessary and lastly they said they can replace the phone. And they did say they would replace the phone when I was at the Apple Store today, but they said that they will only do this once so I opted to try the software reset. I want to say it seems better, but I was still getting more drop-outs than I should. I will be checking it over the next two days as I will be traveling a few hundred miles in my car and will test it, but I am not optimistic based on my experience on my drive home today from the Apple store which is 18 miles.