Just got a plusnet SIM for my mobile phone which was previously on EE. On EE I had voicemail and could retrieve voicemail messages left for me. As soon as I put the PlusNet SIM in my mobile, this changed.
Callers leave messages, and I get a notification that there is a voicemail, but when I log in to hear it the service cuts off almost immediately and it just says 'Conditional Call Forwarding Active'. I cannot retrieve any voice messages.
I have a 2017 Samsung Galaxy J3.
I have looked in the settings but cant find anything which could relate to voicemails or call forwarding.