How to go network preferred in LG 5 H820?

[7162]

I am using LG5 H820 with reliance sim. Now I port to Jio. Network preferred is hidden menu in H820. How to open that? I have tried with all possible code. But unable to get network preferred menu.
Rohit.

 

[B. Diddy]

Moved from the Marshmallow forum to the G5 forum. Also edited out your email address, for your privacy and safety.

 

[7162]

Thanks for the advice