Satellite operators are rather innovative. And the increased internet protocol-ness of all communications is likely to be getting involved. I would not be surprised if VHF radio to ground to internet was available for monitoring information, along with satellite company's phone system: Inmarsat and Iridium. With limited numbers of calls, aircraft systems could even make a deal with ground-based cell providers, or piggyback on satellite links set up for IFE.
I wouldn't worry about misinforming. Since it has been a week, and the communications providers and at least Rolls-Royce would have this knowledge live, so this is all very much after the fact.
If there is any archiving of signals from SIGINT radio stations, then this might also have been known to non-commercial users live. There are space-based assets for the interception of communications, to listen to such a high-value object as a stolen/hijacked airliner with more sensitive ears, although you probably won't be getting any press releases about it.