CELL PHONE SIGNAL BOOSTER? REALLY?

A real amplifier that uses power and has an antenna works. If you contact someone that carries "Wilson" amplifers and tell them who your cell carrier they can tell you what you need. I had to use an amplifier in NW WY all the time until they started building more cell towers about 15 years ago.

Yes they help. If you have a signal they will boost it 1-2bars. No signal then nothing is going to help short of a different carrier. I know for instance at Lapine State park the only carrier you can use is Verizon.

I got an external antenna and it boosts it to some extent, maybe one bar. Some friends live out in the boonies and have had no service, but they actually got a booster that they paid over $400 for and they now have 2-3 bar service within a 100 yard radius of their home. It does work, but I don't know which one they purchased.

ON EDIT: They do have a pretty substantial antenna they put on top of the house, but it let them get rid of their home phone and gave them a little bit of internet access, too.