Of course! It's so easy!

The problem with my signal is that I'm just on the edge of the nearby cells. If I stand by the window of my bedroom, I can get 1 bar, but sometimes it cuts down to zero and I lose the call. I'm hoping there's a solution for this. I don't mind if it's wired to the phone (I can use my headset for talking), I just need it to work.

SE sells this, but I don't know if that will work in either situation (car or home).