Invalid MMI Code

[Doug106]

Hi,

I've been trying to change the time duration before voicemail takes up an incoming call by entering the following.

**61*+447953222222*11*20#

However I get an error message on my phone "Invalid MMI Code" and I've had similar errors when entering other codes.

I'm using the phone in WiFi connect mode as I don't have a mobile signal where I live, could this be a part of the problem?

Can anyone help me out with how I should set the MMI code on my mobile phone?

[Keith_Beddoe]

@Doug106 

Welcome to this user forum for BT Retail phone and broadband customers.

There is some help on this thread https://community.bt.com/t5/Archive-Staging/Length-of-ring-before-going-to-voicemail/m-p/2150307#M12...