Review on 📶 Enhance Signal Strength with Boostel 850/1900MHz Cell Phone Signal Booster Kit for All Carriers 3G/4G LTE - Covers up to 2,000 Sq Ft (Dual Band 850/1900) by Andrew Grant

The first impression is great. Got 1-2 bars with spotty reception at 22ft. A camper trailer is parked in a closed metal carport. Can climb up to 4 poles while standing on the Canopy roof. A mounted Yagi antenna about 25 feet in the air at one corner of the canopy is aimed at a cell tower 3 miles away and installed inside the antenna inside the canopy 15 feet from the trailer. I'm now getting 5 bars in and out of the trailer and internet videos with no lag on my LG V20 phone with Verizon frequencies around 89027. Hopefully this lasts. Update 10/29/2018: Now works sporadically, worse in hot weather. Sometimes it works well from 3 to 10 minutes, and then it cuts off for half an hour or more. I'm feeling lucky. Tried to contact seller but no response.