Though, there is one condition, that The network should be of Aircel itself. If you are roaming and you are registered on some other network, you will not be able to enjoy free roaming.
In this pack, for voice calling you will be charged 1paisa/sec for outgoing calls. SMS will be charged at the rate of 1Rs per SMS and the data charges will be 10paise/10kb if you haven’t activated any data pack.
For more details about the pricing of this pack and how to activate it, You can check : Aircel launched Free Roaming across India Plan. Named One Nation One Rate
After Aircel announced this, BSNL also showed some symptoms of decreasing roaming charges. This seems to be a new starting of telecom war. Just stay connected for more news..