Smartphones running on Google-backed Android software are gaining ground in a hot US market, according to figures released by industry-tracker Nielsen Company. "While the iPhone has been the headline grabber over the last few years in the smartphone market, Google's Android OS (operating system) has shown the most significant expansion in market share among current subscribers," Nielsen said in a release. Android smartphones surged to 13 per cent of the market, Nielsen reported. The gain appeared to come at Microsoft's expense, with handsets based on Windows Mobile software dropping from 27 per cent to 15 per cent of the US market during the same one-year period.

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