My wife's US roaming talk and data boosters are not working, while mine are. She has a moto G4, I have a moto g5. We both are running Android 7, and have identical mobile network settings. I tried turning off her phone, reinserting the sim, and starting it up again. I also tried selecting each available network manually, but each one failed to connect, including AT&T which my phone connected to. We had the same problem with her z10 phone when we originally got the booster, and it's never worked for her, but mine has. Maybe their system is messed up?