Historically, operators like Reliance Communications (which owned the Netsetter brand) and MTS India (later absorbed by Reliance Jio or Aircel) offered migration schemes:
You cannot "upgrade" the firmware or software of the 3G dongle to make it 4G. The upgrade is a physical replacement of the device and the SIM plan. idea 3g netsetter upgrade to 4g
Many tech-savvy users ask: "Can I unlock my Idea Netsetter to use other SIM cards?" idea 3g netsetter upgrade to 4g