This is the same company that Facebook was going to use with Internet.org. It looks like after Facebook's attempt was blocked, he realized he didn't have to be a middleman, and could just offer cheap service on his infrastructure anyway. Still, this comes across as even more damage to Facebook's attempt to be seen as altruistic, even if I expect the profit-seeking is just slightly less obvious in this case.

EDIT: Oh no, the plot thickens! Facebook was working through Reliance Communications, a subsidiary of Reliance Anil Dhirubhai Ambani Group. Reliance Jio is a subsidiary of Reliance Industries Limited. These are two halves of a split business empire; Mukesh Ambani didn't take Facebook's idea, he took the idea Facebook had for his brother!