Depends on where you are. I know a power company engineer in the midwest that has a company supplied at&t cell phone. He gave up and got a personnel Verizon phone as it worked in his assigned sector. So when I need to talk to him I call him on his Verizon cell phone. If I don't need to talk to him I leave a message on his company at&t cell phone.
In general, Verizon has the best coverage but it has holes in service in the US also.
There is no Hope. She left last week.