make my phone ring longer before going into vm

[mncrow]

I have seen answers like put in the following codes which do not work.

I have a lumia phone

[MI5 · Accepted solution]

@mncrow 

Try this guide.

It works for all phones and networks. 

https://community.o2.co.uk/t5/How-to-Guides/How-to-Lengthen-Ringtime-on-any-O2-Mobile/ba-p/1175217

[jonsie]

Help here

Guide:How to Lengthen Ringtime on any O2 Mobile 

You may need to disable wifi calling in My O2

[Anonymous]

I have a Lumia phone and the codes in Jonsie's link work for me. You need to actually dial the code then wait for the screen to display - Successful.