I do not know. I do know that 2 of the 3 required reports were sent. The AHM was not disabled. So I assume likewise that the ACARS was not disabled. Even if it was disabled, we still know the approximate 777 ground track from the AHM and the satellite ground tracks.
This would seem to indicate that the plane has crashed since there was no third report (wheels down) from the system. I have a hard time believing the pilots, at least the FO, didn’t know about the AHM, even if MAL didn’t subscribe to the service.