I bought the JetPack 4G LTE and we went in Florida Keys for 4 weeks.
I could only get 3G for a whole month.
We were at campground at 38801 Overseas Highway, Big Pine Key, FL 33043 and also 70001 Overseas Highway Long Key, FL 33001. Outside the Keys it was ok.
Is there something I can do? Should I use an amplifier or is there simply no 4G services there?