It depends on what you are looking for. If you are in a area with no signal. It will more then likely not help you.If you have a weak signal and cannot make a call. You can turn on your booster and make a phone call.
My parents have the Wilson. It's nice there are in St. George. They had a problem and stop by the store. They gave them a new one. I have a different brand, I was told it was better? They both work .
There is a small transmitter the size of a Hersey bar.If you are in the passenger space, it boost your signal. In bad areas we hold ours on the back of the phone while calling.