how can I get O2 to extend ring time before a call goes to voicemail?

[Anonymous]

My Nokia 300 only rings twice before going to voicemail. This is not enough time for me to get at my phone, unlock it and answer it.

Nokia website tells me that only the service provider can extend the number of rings / ring time. How can I get O2 to do it?

[jonsie]

Or you can switch voicemail off completely until you need it and the phone will ring until the other person hangs up or he gets disconnected. 

Dial 1760 to switch off and then 1750 to switch voicemails back on. You can still use the code above even when doing this. Also dial 1710 to get text notification of missed calls.

[Claire44]

I have an iPhone 8 Plus, how can I extend the ring before the call goes to voicemail?

[MI5]

@Claire44 

Dial  **61*901*11*30# then press the call button.

[jonsie]

Guide:How to Lengthen Ringtime on any O2 Mobile