Telnet at port 23 with root as username and password as password works on older firmwares. For newer firmwares with changed encryption keys, alternate methods are available in community guides.
These devices are not standard Wi-Fi routers; they are . They integrate a fiber-optic modem, a wireless router, and a VoIP gateway into a single box. The Security Lockdown custom firmware for jio fiber router top
: There is no "one-click" custom firmware for Jio Fiber routers. Community efforts (e.g., on the OpenWrt Forum ) show that modern models like the Telnet at port 23 with root as username