The report found that Jio's 4G services are available to users 97.8 per cent of the time, Airtel stood second with 89.2 per cent.
Trai's move to reopen the deadline for ending charges for terminating calls on rival networks beyond January 2020.
India's telecom sector has witnessed a churn with stiff competition, especially after the entry of Reliance Jio.
Kumar Mangalam Birla, head of Vodafone Idea, had sent an SOS to the government earlier also for deferring statutory payments.
Typically, a telecom operator pays for connecting calls of its subscribers to the company on whose network a call terminates.
Vodafone, however, maintained lead in terms of upload with 5.5 mbps speed.
The benefits include 3 months Netflix subscription gift, 1 year Amazon Prime membership and access ZEE5 and Airtel Xstream app.
Jio announced the commencement of JioFiber, its fiber to the home service, across 1,600 cities in India last week.
The broadband service will offer unlimited data, free voice calling to anywhere in India as well as TV video calling/conferencing.
Reliance Jio became the country's largest telecom operator with a subscriber base of 33.13 crore.