Directly I am also getting error 404 but there is another way to add/remove channels, firstly click on transaction, then press the back button & then click on update account, now you will be able to see your current plan. Just Press On edit Current Plan & you Will Be Able Add/remove channels as per your choice.Are you able to add or remove channels from Airtel thanks app bro?
Because i am not able to add or remove channels, i have to do it by sms or call.
Rest all things i can do on thanks app like checking balance, validity, recharge, update Mobile number/name/address etc.
I am getting 404 error all the time.