I am telling my own experience about Jio Phone and recently brought in near by shop.
it is very bad phone because when I call to somebody in this, the not clear and breaking of voice. it is not support to network. The phone is very slow when we on data. And become more heat and battery decreases very suddenly. The function of phone is very slow after using more an hour.
The phone camera is not good quality and photo is not clear. The is not slow the network properly. even in the full network.The Customer service not very good.
Overall, it is a worst phone and not good apps.