Richie

Wilson, along with others in the cell phone repeating business, had to radically adjust what they could bring to market after new FCC rules took effect. Today, they are packaging three separate systems using RG6 coax with yagi style of antennas and 4G compatible amplifiers. Considering the construction of your project, you probably will end up with a splitter and a second rebroadcast antenna inside the structure (at least). I would recommend getting a signal strength meter for this type of project.

RE femtocells; one of the disadvantages with those is that when you are on the phone and entering or leaving the structure, you need to terminate the call and redial, as the femtocell does not hand off like a traditional cell phone.