Think that's the combination of SOS software and infotainment unit. It's an on going bug if the two aren't matched. That's my understanding of the issue. Some posts I've read tend to be alarmists which suggest after the SOS unit has failed n'th many times, its like an airbag it can't be reset and has to be replaced. Not sure how true that one is.
We can summoned the genie and see what they say on your
problem and whether the other posts I've read are true on the SOS unit totally failing
@East Yorkshire Retrofits.