I think to answer that, we'd need to be clear about what we mean by saying that a community "has" a technology.
If I go to a tribe of hunter-gatherers, hand them a bunch of solar-powered toasters, and leave... do they now "have toaster technology"?
I think not. I'd have to think a bit harder to define exactly what I would consider to be "having technology", but my intuition says that being able to build the thing, and/or having people in your society who understand how it works, is a requirement.
To our hypothetical hunter-gatherers, the toasters are outright magic. They haven't the first clue of the most basic scientific or technological principles behind the artifacts that are in their physical possession.
So I'd have to ask what you think is an example of an intervention that causes a community to have a technology, where previously they did not.
Jiro's example of making mobile phones available to a town that lacks the facilities for building its own mobile phones (factories, etc) seems to me a good enough example of an intervention that causes a community to have a technology they previously lacked.
Rationality quotes time!
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