I think they'll run only fibers. Simply replace the STB with new one. And, it might possible they'll change hathway customer STB with JioSTB for no extra charge.
Yes they have. But, govt. is completely in support of Mukesh Ambani so it will not take much time to grind these giant companies in one. Like in Dishd2h and VodafoneIdeaLtd they've and they're taking.
Reliance Industries has initiated talks to acquire India’s largest cable operator, HathwayCable & Datacom, in a bid to speed up the commercial launch of its GigaFiber high-speed home broadband services. RIL in talks to buy Hathway, bring broadband home to you