I have a '19 XT4 and all connected services enabled with OnStar. Under settings there is a option for "Share data with other devices" On or Off. What does this do? I have tried it both ways and seems that I can't connect to internet with it off. If I turn the setting to On then my devices will connect to the internet. So what is this setting for if devices can't connect to the internet while switched off? WIFI only?