[maemo-developers] Does the get_service_provider_name method only return a name if the SIM is a USIM?

[From: Faheem Pervez]

Hiya,

As said in the title: dbus-send --system --type=method_call
--print-reply --dest=com.nokia.phone.SIM /com/nokia/phone/SIM
Phone.Sim.get_service_provider_name returns a blank string. As I only
have a T-Mobile SIM to be trying this out with, I'd like to know if a
string is only returned if a USIM is inserted. Or maybe I'm invoking
it in the wrong manner?

Best Regards,
Faheem