This is a system you can disable as a user, but it's not the on-modem feature discussed in the article.

How would the modem know your coordinates if the OS doesn't provide them?

	▲	retsl an hour ago \| parent [-]
		> [...] The baseband implements other functionality such as Wi-Fi and GPS functionality [...] https://grapheneos.org/faq It doesn't need to ask the OS, it can just get the coordinates and send them off.