A:Answer Short answer: no.
This is a really good product and has greatly improved the reliability of my wifi at home. It would potentially help with your wifi connection in your basement if you were to put one of the satellite nodes down there, but it won't impact your actual cellular reception (like for your phone calls). If you're looking to improve your cellular coverage in a deadzone, I recommend that you look into something called a cellular repeater (or 'cellular signal booster').