More than 126 million mobile phone users in 160 countries can bill digital purchases of games, videos, subscriptions, and more to their prepaid telecom account through a service offered by General Mobile, which operates under the GMobi service mark. The company links an application programming interface to local mobile network operators (MNOs) in 30 countries, mostly in emerging countries, and uses partnerships with other carrier-based billers like Boku, Fortumo, DaoPay, and Bango to reach MNOs in the other 130 countries. Carrier-based billing is a necessity in emerging markets, where so mu...