Even if lockin period exist some of these topups are very good. Nick Hd at 30/pm. 3 Sports HD at 45/pm. Infotainment at 45/pm. Eng Movies at 30/pm . 3 Eng Ent at rs.30 are all good offers. Unfortunately I have specific channel requirement and I don't want to lose existing topup for random channels. Airtel should be more transparent on lockin period and channel lists.