When I receive a message, the notification enters without problem.
On e iphone I click on play for the message, there is a delay of a second before hearing the voice.
Hey @Adassa1 and thanks for reaching out.
I have to admit that it's the first time that I hear about a delay on the visual voicemail.
I use OS11 on a Iphone 7 Plus right now and there's no delay at all.
My suggestion would be to do a full restore of your phone throught iTunes.
Of course, you would need to back up your phone first to make sure you don't lose any information.
From there, if you stil have a delay issue, I would suggest to visit a APPLE store to see if they have more information on this.
I hope this helps.
I was at Apple store.
Technician told me that he has iphone with fido and has same delays.
he made check-up of my phone and everting materiel was correct.
Guys from Fido store told me to call technical support, i didn't yet.
Yes it persist after a many full restart of device
As i said, i have this since upgrade to OS11, I had same problem on iphone 6S plus and now on Iphone X.