The telenor earluer known as uninor is famous for this cheap call rates all over the except few states.Its call rates are 25 paise for the local calls as well as for the national calls.That means if ralk to someone through this sim card you will be charged only an amount of rupees 10 for 40 long call minutes.I believe this is the cheapest calling rate.So now that you charged less for more you talk to your friends and relates more freely.The negative point of this sim card is only the network problem.