We just signed up for T Mobil and got the Wi Fi Box and they tell me service is great in RP .
Also no roaming cost, so full usage down there at no added cost. Unlimited Gig for internet usage. I just
started using it at home in Casa Grande and it is way faster than verizon and we saved about $ 35.00 on 2 lines.
For those who Summer in Show Low they claim there is service there also. Canada is also free.