It is very useful sim for me. I am using this sim last 2 month. Speed is very good. Speed goes to 23-25 mbps downloading and 10-15 uploading. I’m always calling by Jio sim card. It is very good for us. My friends also purchase Jio sim card. It is free of cost. In Reliance mini store only u can visit on mini store saw a bar code it was generated by my Jio app.