If you recharge and queue up your 399 plan today without any IUC talktime,it will come into effect on 13.2.20 and if IUC is not abolished by then, it will use your 45rs talktime to make calls at 6p/min. If the IUC is abolished before or during the validity of your 399 plan then it will automatically get converted into a true unlimited calling plan from the same day without need for any action from your end. So you are at no loss even if you do the recharge today, but I asked u to wait coz there may be some better plan launched by that time but yes you run the risk of losing out on the current prices if the tariffs go up in December. So take your pick.