I buy it in september 2016. I present day its work very good. It is a god for 3g smart phone .battery backup in jio fi is also very good. I use it 24 hours .
And jio is a very good network ooerator. Jio speed is also very good I got 6 mb/s download speed
I use jiofi also for calling . Useing jio voice 4g app calling quality is also good.