T500 WWAN indicator won't turn off

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Has anyone had the problem of the WWAN indicator (the one between Bluetooth and Num Lock) not turning off? Neither Fn-F5 doesn't even show the radio as manageable by the utility - it's simply not there, for some reason - and I can't turn the thing off. I'm assuming it's indicating that a radio is on that I don't need right now, using juice...

Drivers etc are all up to date. Thanks for the help.