no-one-yet··on Why SMS Refuses to DieWhile the internet is fairly reliable, I see a value in having alternative that doesn't depend on the internet.
no-one-yet··on Ask HN: How did Uber app know I was flying today? Info leakageMaybe it wasn't clear but if you got this while at the airport or on a route that is associated with the airport then perhaps that information can be inferred from your location.