First check whether TCP is open or not (check by connecting through PD proxy)
Settings :
Protocol :- TCP
TCP Port :- 443 or 80 or 8080
Proxy :- take any proxy of port 3128 from HMA
Host :- airtellive.com
Try at 0 bal or check data deduction (if you have any data plan active
)
And yes keep this in mind using TCP tricks in Airtel may lead to sim blocking