I think it surfaces ALI built into E-911 Phase 2 requirements: https://www.fcc.gov/public-safety-and-homeland-security/policy-and-licensing-division/911-services/general/location-accuracy-indoor-benchmarks#block-menu-block-4 … or the ELI5 version:https://www.reddit.com/r/explainlikeimfive/comments/7mb35n/eli5_if_there_is_no_cellphone_signal_how_does_the/drsxmdn/ …
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After you end the 911 call (I spoke to the operator explaining it was a test call) it tries to contact numbers in your emergency contactspic.twitter.com/1kX1uMTie7
