I am also using jio SIM in my smartphone jio is very nice Guinness 1 GB data everyday as well as unlimited calling with local STD and roming Today jio spreaded the World India also also launchet he is smartphone which is Vere cheap before launching jio data pack was expensive but no data back is chup I am very happy for using jio and gradually jio is becoming big network in India I think everyone must be happy while using jio and jio data back is also cheap compared to other company castomar service is also very good ok thanks