Welcome to the Community, @rlprice1me.
Fingers crossed some of the above @Chris682 has recommended will do the trick - sometimes phones just need a bit of extra coaxing to recognise a roaming network, and even I've had instances where I've needed to do a restart to get things working when I land.
It's worth double checking to make sure she hasn't accidentally toggled roaming off in the phone's settings, too.
If none of this makes a difference, please give our team a call, and they'll be able to check over all the roaming settings at an account level too.
Peter
