If you have an area that has some cell service, and you put the antenna there, the signal should be boosted in any area that you can run coax cable to 50 ft. away. Note that you need to be very close to the internal device for maximum boost, but you will probably get some signal in an entire room that had none before. Picture a basement office that has no signal, and an upstairs that has a decent signal. you should get a very good signal in the basement office.