As mentioned in my previous post (above), I tried a Jetpack and ran tests for 45 minutes, switching bac and forth between using my S7 as a modem and using the Jetpack. I placed them, one after the other, in the same exact spot and tested the speed , as a modem. I switched back and forth 7 timed and found the Jetpack download speed varied between 1.7 and 2.9 Mb/sec. The phone download varied from 4.7 to 6.2 Mb/sec. If you're considering a Jetpack, run your own comparison first. Maybe you'll get better results with an older smartphone.
As a result, I returned the Jetpack (with a $35 return fee) and turned on my old S5 to use, exclusively as a hotspot. I mounted the S5 in a Wilson Sleek with a Wilson yagi antenna on my rooftop. I still don't get enough speed to consistently view streaming video.