To identify the most promising global mobile companies Informilo asked some of the most active investors around the globe to nominate and evaluate companies outside their own portfolios. Some are well-known, others are below the radar but unlikely to stay that way for long. Read on to discover Informilo's 2012 picks for the mobile top 25. The companies are also featured in the 32-page print magazine Informilo produced for the Mobile World Congress, which is taking place in Barcelona February 27-March 1.

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QuBit Digital, a start-up focusing on analyzing big data for business, was founded by four ex-Google employees who funded the new company by selling their own Google options and investing their life savings in the London-based venture. It is no anomaly.

Just as the so-called Paypal mafia in Silicon Valley ended up defining the next wave of innovation, a swelling group of Xooglers, as ex-Google employees are known, are leaving the mother ship to either launch or join start-ups or to start funds in Europe.Read more