Yesterday, my T-Mobile home page included a link to their page titled Wi-Fi Calling and 9-1-1 Address. This describes their method of providing 911 caller geo-location information when using a T-Mobile phone that’s connected via a Wi-Fi access point. [“Wi-Fi Calling” is their tradename for VoIP (Voice over Internet Protocol).]
Like their cellular phone 9-1-1 location strategy, it doesn’t rely on the caller phone’s GPS receiver. Also like their cellular geo-location strategy, it tries the most precise method first, and falls back to progressively less precise methods. I guess that the other U.S. cellular companies employ a similar VoIP 9-1-1 strategy.
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© Russ Bellew · Fort Lauderdale, Florida, USA · phone 954 873-4695