How does Airtel's long term billing work?

[Starman]

Hello,
I was wondering how Airtel charges you on longer term plans like annual or semi-annual ones. If I opt for an annual pack on installation itself, will I get the option to change it later or will it be annual billing for the lifetime of my connection? Also, can I change the plan in between of my term if I want to upgrade/downgrade?

 

[dj2006]

Yes, you can change anytime. Earlier they did not refund the GST amount paid but now they do.