Hi friends,follow the below steps
1.First download below hk kdz version and flash ur mobile with it using lg up
https://yadi.sk/d/kW7fGfUQuHSAZ
2.Flash cam ui v3 system from below thread
http://forum.xda-developers.com/g4/general/custom-rom-lg-g4-h818p-h818n-lp-t3384632
3.after that u need to delete all apn and add two new apn as below
Name: Internet
APN: jionet
Type: default,ia
Protocol: IPv4 and IPv6
Name: IMS
APN: ims
Type: ims
Protocol: IPv4 and IPv6
Now enable volte and ims fro hidden menu option from settings page .restart ur mobile. Check the debug screen on ims setting of hidden menu to know wheather volte is enabled
Thanks to starpandi for hk kdz and other help
1.First download below hk kdz version and flash ur mobile with it using lg up
https://yadi.sk/d/kW7fGfUQuHSAZ
2.Flash cam ui v3 system from below thread
http://forum.xda-developers.com/g4/general/custom-rom-lg-g4-h818p-h818n-lp-t3384632
3.after that u need to delete all apn and add two new apn as below
Name: Internet
APN: jionet
Type: default,ia
Protocol: IPv4 and IPv6
Name: IMS
APN: ims
Type: ims
Protocol: IPv4 and IPv6
Now enable volte and ims fro hidden menu option from settings page .restart ur mobile. Check the debug screen on ims setting of hidden menu to know wheather volte is enabled
Thanks to starpandi for hk kdz and other help