T-Mobile doesn't have a network. Probably never will. Time will tell,
but, from what I'm seeing, a lot of companies which are in heavy
construction are switching to Sprint to get durable phones. The service
may suck but the phone will last more than a week.
Here's a hint to Verizon's upper management. If a phone really is
military grade, there should never ever be "refurbished" (now called
crtified pre-owned) versions for sale. When real military grade phones
fail they are completely beyond repair.