AFAIK ECall uses a voice call with data encoded on the audio channel. This is not what telemetry does, it should be doable to leave the voice channel and disabl

AFAIK ECall uses a voice call with data encoded on the audio channel. This is not what telemetry does, it should be doable to leave the voice channel and disable any data connections. (But it's probably very hard to check for someone who has no background in emebedded systems). Plus, in theory an emergency call can be done without even using a SIM card, right (if network allows)?