Airtel has already started the trend by hiking, or rather say doubling the call tariffs by 100%. Calling rates are now 2Rs per Minute compared to earlier 1 Rs per minutes. They have also bumped up prices of recharge vouchers for special tariffs and services by 5-15 Rs across the range. Idea is also planning the same, however the roll across across all their networks will take time. Airtel has started this currently in 4 networks. So time to pay more for your calling, and no more freebies. Actually calling here is probably the cheapest in the world, compared for each minute at actuals. However what propelled the growth of the cellphone in the second largest market in the world were the ultra low calling rates, and super cheap cell phones. I guess now that we are hooked, there is no looking back, and the companies are free to hike and set the rate.