A few years back I was using the VERIZON MIFI units sitting in a WILSON CRADLE that had a outside antenna setup. You just sit the MIFI unit or you cell phone in the WILSON cradle and it give great operations using the extended height of the Wilson Cradle antenna. This was back in the 2G-3G days and I never updated for the 4G setups...
Still works like gang busters for me tho however but the MIFI unit I am using is slow throughput speed and does not do well for movies or HDTV internet signals. Only use it for checking in with the kids, paying a few bills, and some surfing the internet. I only have a 3G database account with Verizon so it works fine for me...
That might work for you if you had a better MIFI unit and a much bigger DATA PLAN with an internet carrier. Check out the newer JETPACK for 4G setups...

MIFI 2200 model

Google images
Roy Ken