At no point did I say "nobody ever makes voice calls any more".

The point being the option to call emergency services still makes phone software the killer app for smartphones.

"Calling emergency services is the killer app for phones" - yes.

"Calling emergency services is the killer app for smartphones" - no. "Killer app " implies that this is the reason people buy them. If this statement was true then people would buy cheap feature phones.

It's worth repeating the original statement here:

> smartphones didn't have "a" killer app per sè I don't think, but they became part of everyone's daily lives in a really short timeframe. [...]

to which alach11 replied:

> The killer app for smartphones is being a phone.