Galaxy 10 certainly work on PM
You sure you didn't disable Mobile Data? ? Make sure it is enabled.
Also, what is showing on APN
Try a network reset
and this is the APN setting for PM
How do I make sure everything is set up right?
When I use my phone for ANYTHING but Facebook..
I get the message NOT REGISTERED ON NETWORK??
Not registered to network is a message that means that you're not conected to the mobile network. This can be because the wrong network is selected, there's no service (ex. not activated or cancelled), or this can sometimes happen when there's a network problem. Can you try reselected the automatic network selection option to see what happens?
Look like your Mobile data is not setup yet.. Something to do with APN
what model is your phone?
Was it working with another provider before/
APN settings not being set wouldn't preent the connection to the cellular network APN settings also wouldn't affect phone calls or text messages.