Reliance JIO is a Indian Telecom Network started by MUKESH AMBANI . It works only on 4G phones and it gave free data to all Indians those who have 4G phones. First Jio is only for Reliance Employees and then to Reliance owned LYF smartphones and after that to all 4G phones and itis giving almost 9 months free data, voice, sms and all Jio Apps. Personally I am using jio sim