Universal service funds (USF) are set up by levies on telecoms in individual countries, which are then used to increase consumer access based on criteria such as income distribution, rural and urban population ratios, literacy and geography.

BBC: Rural and poor mobile access funds 'not being spent'

We use a field-tested methodology with our clients that is supported by a proprietary analytic model for forecasting population and income distribution annually through 2020 in urban and rural China.

FORBES: Unlocking China's Consumer Power