This sim card was introduced by the indian businessman Mukhesh Dhirubhai Ambani.It is very good service for the indians.In this you can purchase a free jio sim card and use it free till march 2017.You can use daily 1Gb data and post that you can use data services at 128Kbps.The customer service is not soo good but not bad.They may give you wrong information at times but it also depends upto the person.