How do I set my phone so that callers can leave a message.

[Bovril]

Somehow I seem to have lost my voicemail. I can access it but no callers can leave a message. I think I may have deleted something in error. A crucial phone number perhaps?

[Cleoriff · Accepted solution]

@Bovril 

All info here re voicemail Guide: All you need to know about O2 Voicemail 901 

If it's not working correctly then you should call O2 to see if they can reset your account, All numbers in this guide Guide: Coronavirus Community Help and Support