Apparently they have signal mostly in town but I dont think it gets out as far as Nong Pai Noi. If it does it too weak to be effective. My gf went to their office in the city and gave them her address. They were suppose to 'get back to her if she was within range'.
To date ....she has not heard back.
Kerr69.....you mentioned you are in the area of Nong Pai Noi. May I ask where you are in relation to NPN? Past the Temple and School toward the end of the road? Or Back toward town near that nice Purple Fence with NO house....there is a village near there other side of the street...where the 'bus stop' is for the kids on the highway.