The signal is good outside of my building but it's terrible or even no service inside. This booster saves us. Pretty lightweight and easy to set up. This is a great alternative if you live in an area where your cell phone service signal is minimal. We live in a steel-framed house with a steel roof in a wooded area with a high cliff behind our house. We always had to go outside to talk on the phone. Cell service went from 1 bar to 3 to 4 bars can talk inside the house on our cell phones now. It is a strong enough signal to even stream the internet and Netflix! I have and will continue to recommend this to everyone I know with cell service issues!