I unboxed my Pro1X, put in my T-Mobile SIM from my Pro1, and did the initial set-up. I disabled wifi and placed a call to my voicemail (it worked until the cell signal got too weak, which is normal at my house). I then sent a text message and it was received.
Obviously, this is a very small test, but it does show that my Pro1X does work on at least one tower/band here. I'm in Minnesota, NE of the Twin Cities.
My phone was at about 50% battery when I took it out of the box. I have it plugged in. I'll have to look around for how to enable charging when powered off, how to root it,