I am using a reliance jio sim which I bought with flame 1 on 21 July 2016.
I got my sim activated the very next day I bought this handset.
But I am facing is that calling strength is even poor than that of telenor. You'll have to call consequently 15 times a number to get connected. You'll get bored.
My only data services are working fine but with a 3g speed of 200 KB - 1 MB On an Average. I have also shared my problem with Jio feedback service.
