A new report by research firm Gartner predicts that the global mobile phone market will rebound more strongly than expected this year as improving economies boost spending on new gadgets and handset vendors push cheap smartphones. The market fell 1% in 2009, the first decline in eight years. But Gartner analyst Carolina Milanesi said she now expects the market to grow 11-13% this year, compared with the firm's December forecast for a 9% increase.