ZunZuneo was popular here in Cuba. The service provided news - on sport and culture in particular - straight to subscribers' mobile telephones. But users had no idea they were signing up to a programme created in the United States.
Funded by the US government development agency USAID, ZunZuneo targeted young Cubans in particular. Ultimately, the goal was to send political messages via the network, aimed at provoking a 'Cuban Spring'.
But users told the BBC that the service ended abruptly over a year ago, before they received any kind of political content. Confirming that the project did indeed exist, the White House called ZunZuneo a 'development' programme, intended to help the 'free flow' of information.
But the US has a long history of trying to provoke regime change in Havana: starting with assassination plots against Fidel Castro - then a trade embargo - and more recently, high-tech projects like this one.
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people who choose to receive a service or product regularly, often by paying for it
causing a reaction, especially an angry or negative one
suddenly
material such as words, pictures, videos or music that appears on a website or other electronic medium
a complete change of government, especially one caused by force or by another government
the murder of a famous or important person
a government order to stop doing business with another country