Carrier billing is evolving from being a niche product for phone-centric content into a mainstream payment method used by the world’s major brands for all types of digital products,” said Boku CEO Jon Prideaux in a press release. Clearly, he is confident this is the future of mobile payments, though the field is still crowded in terms of payment options and competitors.

http://www.geektime.com/2016/09/01/direct-carrier-payments-get-a-boost-as-startup-boku-scores-13-75-million-funding-round/