Before you download any driver, you need to understand what you are working with. Airtel has released several generations of “My WiFi” dongles over the years. While they all serve the same purpose (converting a 4G/3G SIM signal into a WiFi hotspot and a wired USB internet connection), they use different internal chipsets.
Microsoft deprecated some old modem drivers after Windows 8. You need to force install the driver in “Disable Driver Signature Enforcement” mode (hold Shift + Restart → Troubleshoot → Startup Settings → Disable driver signature enforcement). airtel my wifi dongle driver download