I think that whatever Mukesh ambani sir did for us is great we never thought that we will get free 4g internet.Many people are commenting on social media and other places that jio speed is not good enough, calling problem etc.My answer for them is that it is free thing and never comment on free thing.Jio is an awesome choice for many people who dont have money to learn things.They can learn from the internet because there is free internet for all .Its not about 4G compatible devices.Because people can generate barcode on 3G devices also by using some app.If they don’t know how to use jio sim in 3G devices then my answer for them is they should search this question in google.