I have aircel mobile operator and with my own experience find the internet fine with both 2g and 3g plan for about 1-5 years, sometimes with offers.the speed is more or less very good but deduct main balance without notifying when data is exhausted or validity expired or sometime cost main balance when 2 pack is activated.the customer service is not too much responsive except few one.and often get the line busy.
It is a very bad provider