Collegial roaming?

[magnatron]

Looking at the Roaming Network Info it looks like national collegial roaming is offered.
Is this conclusion correct? Does “roaming” also imply being able to use other collegial national networks when the “preferred supplier” is not available?

[afzal_m]

@magnatron yes it is correct

But it still possible that in some places there is no network available at all.
Some operators only activated part of their networks.