Reliance jio is very very useful. Every person love and like it.Life is become very simple when reliance jio sim is published.There is no doubt that reliance jio sim is very useful . When jio sim is published than recognise that india wll be like digital india. Network are allso available in all area town and village. Net speed is very good . Also good customer care service about helping for network. There are some problem during calling mostly time busy line batata hai . it is good for learning digital . First 6 months us totally free so we can ay that service charge is very low. But there are also a problem that jio sim is use only 4G handset.