This is what I could gather from The-Ken article (behind the paywall) for two big players.
Reliance Jio
- Has multi-year contracts with Ericsson and Nokia.
- Nokia to provide equipment from its AirScale radio portfolio, including base stations, high-capacity 5G radio antennae, and remote radio heads. Ericsson will provide 5G RAN products and solutions and E-band microwave mobile transport solutions
- To deploy a standalone 5G network. This needs a new core. JIO is building a 5G software stack with its own R&D team, along with Radisys (its US subsidiary).
Airtel
- has signed agreements with Ericsson, Nokia and Samsung.
- is placing a non-SA 5G network, leveraging the existing 4G infra.
- has a partnership with TCS to build O-RAN-based radio and an indigenous 5G stack.
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