This feature has taken us a long time to confirm, readers - sorry about that. Testing it would have required us to call 9-1-1 for the sole purpose of testing out a neat new tool on a smartphone, and aside from being extremely illegal, none of us wanted to explain to a hard-working emergency dispatcher that we were using a vital service to write up a blog post. And on that note, please, please don't test out this feature on your own Android M preview build.

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