I am in Oklahoma City ok and this city is the reason I ended up buyingVerizon prepaid phone and eventually went with Verizon full time.
It's fall 2018 I had just finished my over road training and was about to be assigned to my first truck. My training had ended in Dallas , the nearest terminal was outside of Oklahoma City.
The goal was to have me come to Oklahoma City pick up a truck and drive to another terminal where I would meet my co driver.
I arrive at the small drop yard/driver lounge on a Wednesday night. Thursday morning I attempted to call my DM (driver manager) I have no cell signal

I try standing in different areas,
I try rebooting the phone
I try roaming
Absolutely nothing work

That was Thursday.
Friday all day long on my phone is a message Mobile network down.
Saturday morning going into Sunday same message Mobile network down and a second one Mobile data network down for system upgrades.
Monday morning no service of any kind.
Monday afternoon my phone finally ring twice and that was it .
Tuesday afternoon I get a incoming call I can barely make out what the person is saying before the call cut off.



Wednesday afternoon I was finally able to get a call to through to my DM
The company had no idea where I was.
The mobile carrier I was using at the time was TMobile.
I continue to use them along with Verizon but eventually switch to Verizon full time because there are two many areas where TMobile service just drops and it can be minutes or hours before you get coverage again