You might have been forced to rush out of your room to avoid missing your important call from your boss or your important customer or major vendor or your spouse on tour, because the cell phone signals often get cut in your bedroom or your hall or any particular part of your building. To avoid this you need to have the cell phone repeater instruments installed in your building. www.powerfulsignal.com are experts in this business and make custom made amplifiers / cellular system for your building based on your floor design specifications. These can be installed in your car also, and will help you to get full trouble free cell phone signals throughout.