I've tried holding down "1" and "*86" with the same result - "you are calling a non-working number".
I can use the internet, send texts and make phone calls but I can't access voicemail.
Soggestions?
I would suggest calling the prepaid customer service number at 1.888.294.6804 to get assistance with figuring out why you don't have voicemail.
Which phone model do you have? Postpaid or prepaid?
Moto G4 Play, XT1609, prepaid.