We had a Verizon Samsung cell phone extender that went through our internet. It died a couple weeks after our last wind and hail storm and we lost power. Free or not, these things are not a panacea. Let's see if we can count the ways:
- Works through the internet, duh. Which means if your internet is down and/or spotty, so is your cell phone service.
- If you have internet data limits, cell phone service will suffer. When we hit the data limits with that God awful Excede satellite service, we would get the "Wa, Wa, Wa" sound effects on our cell phones. They could hear us, but all we got were the adult sounds in a Peanuts show.
- If you lose power, you lose GPS lock. Don't know if it's policy or fed law, but these extenders won't work without a GPS signal for 911 calls, at least ours didn't. We live in a metal roofed house, so every time we lost power, I had to take the extender outside to get a GPS signal, then bring it inside and hook it up to the network router and power. What a PIA. If you can install it near a window or don't have a metal roof, this might work better for you.
We're now in the process of getting a Wilson/weBoost cell phone booster. Assuming we have a good enough signal to boost, then then the only downside is a power loss.