Our cell coverage with Consumer Cellular uses the Doro 618 "flip-phone" - primative but serves our needs well.  We live about 3 miles as the crow flies from the nearest tower (an AT & T) and our cell service has been spotty with few bars and too many dropped calls.  After exploring options (satellite and mifi) we decided to take advantage of the 30-day trial period and get this Wilson unit to see if it would boost our existing service.  It did!  I mounted the antenna on a pvc pole on the roof and ran the coax cable just under the roof line, down the corner of the house, and into the kitchen at floor level through a hole I drilled in the wall.  I did have to use both the 20' AND the 30' lengths of cable that were supplied with the unit (using the connector that was also supplied) and had just enough cable to get inside the kitchen.  When I plugged everything in the inside booster unit showed two green lights immediately and the cell phone showed a solid 4/4 bars.  I did not have to adjust the "gain" buttons at all on the booster (I'm not sure how or when I'd need to do that anyway), and as long as I have two green lights and 4 bars I won't monkey with them.  We use two identical cell phones and have 4 bars now throughout our 1200 sq ft home (the kitchen is right in the middle of the home), so even though it's touted as a "small home/room" booster it works very well throughout our entire house.