https://community.o2.co.uk/t5/Tech-Support/Ringing-length/m-p/1584484#M26930 <P>I <EM>think</EM> that the MMI codes don't work if you have WiFi calling enabled on your account (or phone - not sure which) <a href="https://community.o2.co.uk/t5/user/viewprofilepage/user-id/3755949">@Creda1</a>&nbsp;.</P> <P>Plus you have to be on mobile data and not WiFi.</P> <P>See some more information in the guide below.</P> <P><LI-PRODUCT title="Guide:How to Lengthen Ringtime on any O2 Mobile" id="Guide035"></LI-PRODUCT>&nbsp;</P> Thu, 10 Nov 2022 13:22:10 GMT gmarkj 2022-11-10T13:22:10Z https://community.o2.co.uk/t5/Tech-Support/Ringing-length/m-p/1584479#M26928 <P>Can you tell me why the extending ringing length codes do not work on my X3 Pro and my X5 Pro, thanks</P> Thu, 10 Nov 2022 12:49:34 GMT https://community.o2.co.uk/t5/Tech-Support/Ringing-length/m-p/1584479#M26928 Creda1 2022-11-10T12:49:34Z https://community.o2.co.uk/t5/Tech-Support/Ringing-length/m-p/1584484#M26930 <P>I <EM>think</EM> that the MMI codes don't work if you have WiFi calling enabled on your account (or phone - not sure which) <a href="https://community.o2.co.uk/t5/user/viewprofilepage/user-id/3755949">@Creda1</a>&nbsp;.</P> <P>Plus you have to be on mobile data and not WiFi.</P> <P>See some more information in the guide below.</P> <P><LI-PRODUCT title="Guide:How to Lengthen Ringtime on any O2 Mobile" id="Guide035"></LI-PRODUCT>&nbsp;</P> Thu, 10 Nov 2022 13:22:10 GMT https://community.o2.co.uk/t5/Tech-Support/Ringing-length/m-p/1584484#M26930 gmarkj 2022-11-10T13:22:10Z https://community.o2.co.uk/t5/Tech-Support/Ringing-length/m-p/1584490#M26932 <P>Yes, the codes don't work when WiFi Calling is activated in you account for some reason</P> Thu, 10 Nov 2022 13:55:17 GMT https://community.o2.co.uk/t5/Tech-Support/Ringing-length/m-p/1584490#M26932 Enlli 2022-11-10T13:55:17Z