I understand this is a beta, however, I was wondering if anyone has encountered an issues with cellular coverage dropping and the phone (iPhone 5S on Verizon wireless) is continuolusy "searching..." for cell receptio. It won't even say "No Service." I have tried everything you can think of, including doing a full restore, and even downgrading.
iOS 9 Beta 4 Cellular Coverage Issue
Did it improve after you downgraded?
Did you try with LTE on and off to see if any difference there?
I had a phone that dropped a lot of calls on my iPhone 6, and it also had the front facing camera slighly offset from the camera circle. When I went in to get the camera fixed, the Apple tech said it also could be my reason for poor cell reception, as there was antenna circuit in that area. Not sure if anything similar in iPhone 5s, but something to check.