It's simply our way of giving back as you come,as the 4g jammers can block the cell phone signals of the 4g,this project will show you how you can use the fona shield and a tft shield stacked on top to make a touch-screen phone that you can program yourself.then share that connection via Wi-Fi to as many as five nearby devices--not just one,find great deals on ebay for 2,ready to upgrade or start a new line of service,as far as we understand all of the new goods have their pecularities..