Reliance india private ltd.company has launched a extraordinary idea of releasing JIO network.it crashed all the 4g networks in india by free internet & calls for 1 year.and extended to july on subscription of jio prime and 303plan and above on or before april15.and guranteed lowest data prices till 2018.over 70million user had registered on jio network and its is fourth largest network in india.it also has some lags i.e only 1gb per day and poor calls only available for 4g phones.although I prefer jio network