WeBoost 4G-S and Sprint

[chucktate]

I purchased the refurb WeBoost 4G-S booster. I have a ATT Phone, Verizon Hotspot and recently purchased PCforPeople Sprint Hotspot. I was hoping to use the booster with the Sprint hotspot, but come to find out, the frequencies are too high for the booster (From Support at WeBoost). Any boosters known for Sprint Hot Spots? I'll probably keep my booster for ATT and Verizon, but would be nice to have one that covers all my devices  . WeBoost said the 4G-S only covers the Voice for Sprint Phones.