How to extend the ring duration while a person calling me

[Sabareesh_240302]

How to extend the ring timing 

For eg :-

Default ring timing to. Custom 

15sec ring timing to 30sec 

Every Time the some MMI code the popup msg arrives as Connection error or MMI Code is invalid

How to solve this?

[RajathSR]

https://youtu.be/d2CixWEhWXQ

you can check this video, it will guide you
but keep in mind that ...it depends on the network provider and the method shown in the video might not work for you.

[Sabareesh_240302]

Ok bro

[cs-member11]

Dear Samsung Customer,

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Samsung Customer Support.