As per the sony instructions checked with JIO operator in india for volte enable in xperia z2 d6503, they said there is no firmware update from network side, you have to contact sony for firmware update. Please look into this issue inorder to enable volte.
Data is working fine and unable to make hd calls
As already checked many topics in sony forums for the update of volte and finally sony released update for xperia XA. Please do the same for xperia z2 d6503
