These instructions will help you. Press and hold the #1 key, listen closely and follow the verbal instructions on how to set up your voicemail box. If you are still experiencing issues then the next best step would be to contact your service provider for further assistance.
Hi Jammy2085, please try the steps from Jayman1973 to set up voicemail. If you still have an issue, we suggest you to check with your carrier and they will help you further.
Thank you Jayman1973