We use them amongst our radio friends here locally. They work good. But yeah if the networks down……..duh! I live the rapid radio commercials bragging they work in the non cell working conditions. And I know guys that believe it! We had a local outage and now they get it.I used to have a issue with these in the beginning as they constantly implied that the system would remain viable if cell was down.....
If it has a sim card
It's using cellular system
Other than that they do what they are supposed to do.
I think mole did a review on some of them.
73
Jeff