Please help me set up my voice mail/ greeting message

Which number your voicemail box is, that’s depending on your carrier, check via Google or contact your carrier.

Then call your voicemail box and listen to the main menu.

How to turn your voicemail off and on, an example from my carrier:

Call 12331 to turn On my voicemail.

Call 12330 to turn Off my voicemail.

Call xxxx and press 11 for the main menu. Choose 2 for the personal settings of your voicemail. Choose 3 for PIN code and choose a 4 digit code. You can also change your pin code here and indicate when your voicemail should ask for the pin code.

Contact your carrier for help with voicemail, it's their service.