By Clare Kane and Robert Hetz MADRID (Reuters) - Revenues may be declining and customers disappearing for phone companies in recession-hit Spain, but that has not stopped Jaime Bustillo from launching a new mobile operator in the depths of a downturn that has left 27 percent of the workforce unemployed. Bustillo, who used to work for Spain's second-biggest operator Vodafone, established Airis Mobile in May as an arm of low-cost technology firm Airis and hopes to attract 50,000 mobile customers in a year. ...

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