How would that work?
The phone could literally pop up a consent alert asking whether to respond to a GPS ping request from the carrier. Or just not honor the pings at all unless you dialed 911 within the last hour.
This is a specific service inside the phone that looks for messages from the carrier requesting a GPS position, it could just refuse, or lie. It's not the same as cell tower triangulation.
Send the GPS location only when dialling a 3-digit number? Phones probably know which numbers are emergency numbers
A phone knows if it’s dialing 911. It can activate features on this criteria
It already exists. Emergency call is spec-defined.
Carrier* Android and iOS both integrate with RapidSOS UNITE. RapidSOS then processes the rich emergency information from the user's device (enhanced location, videos and photos, etc), and is available to the 911 dispatcher in their dispatch software. 99.99% of Americans are covered by RapidSOS integrations in their municipalities.
https://rapidsos.com/public-safety/unite/
When the call comes in they can click a button and query RapidSOS for current 911 calls for that number and pull the information inwards.
https://www.baycominc.com/hubfs/2025%20Website%20Update/Prod...
Phone detects that you call emergency service and enables gps.
Last time I called 911 (well, it's 112 in my country) my android phone asked if I want to provide gps coordinates. I did, but they still asked for address, so probably this is not integrated/used everywhere.