My wife and I are full time RV'ers. Currently we are in Island Park, ID about 20 miles from Yellowstone. In our park my LG3 and Iphone6+ have 3G service, my LG tablet sitting next to the phones have no signal. The Verizon service map shows a field of red in Idaho with a small white circle where my location is marked.I can drive 1/4 mile and have 4GLTE service. This is a regular occurrence on the road. What can fi x this?