iPhone 6 voicemail

Call xxxx to listen to your voicemail messages.

Which voicemail box number you should call depends on your carrier.

Listen to the menu/options.

An example how it works with my carrier:

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.

Unheard messages are stored for 8 days. Messages you've listened to will be gone after 24 hours. Longer storage is also possible. Press 5 while listening to your message and it will be saved for 7 days.

Contact your cellular carrier.

Voicemail is a carrier feature.