This works with laptops and tablets.
NO - it does help anything but waste your money
deb, if I'm understanding your question correctly, no, it has nothing to do with your cell phone. It's not a booster for your cell phone signal nor does it help your cell phone to get a better connection. This device provides a wireless internet connection (WiFi) for your other devices such as a laptop, tablet, smartphone, iPad, etc.
The only relationship it may have to your cell phone is if you want to connect your smartphone to wifi in order to use the internet.