Reliance jio smartphone is I think due to jio 1500 casback offer they have got an offer for this phone otherwise in case of features and all other speakers and headset are not working.
I dont no why this is happens to me only the fully pack piece is defective I have open the pack the speakers and the calling function is not working.
So with my review I can say that the fully phone only smartphone are capable for 4G set otherwise the phone is not working with this small headset.