Have airtime in your airtel SIM or active data plan is another major cause of often disconnection. At times, stuffed-up IP address (when lots of people are using one IP at the same time) can also be the cause of the issue.
Note: The Airtel unlimited free browsing tweak is still blazing very well as at the time of publishing this post. Make sure you set your network mode to 3G or 4G LTE and if it still disconnects, kindly try another VPN with it.
For those that are still complaining, change your Host Address and Port to any of the IP’s with its Port below, to connect and surf with N0.0 via any of the specified VPN and Airtel sim.
Other setting still the same.
If you are new on airtel free surf Check Here