With voicemail all set up, you can now access and listen to your messages. In the Phone app next to the Voicemail tab, you’ll see a badge with a number, which represents the unheard messages you have. To listen to your messages, open Phone app and tap Voicemail at the lower right side of the screen.
To switch voicemail back on, dial 1211. Record new voicemail greetings. You can record new greetings by calling 121, standard call rates apply.

Sep 01, 2017 · Then, click on the name of the person you want to create a custom voicemail greeting for. (Image source: Lighton Phiri) Once you're on the contact's information page, scroll down to the section labelled "When This Contact Goes to Voicemail". Click the drop-down menu beneath this heading and select a greeting that you've created to use.
Most of the time this error is caused by the connectivity of your phone to a cellular network or WiFi connection. The easiest way for solving this issue is by turning the Airplane Mode ON. On your main screen of the phone, you can swap down the notification bar and tap on the Airplane Mode option. Once it is ON all the connectivity to your phone will be turned off. You can wait for 30 seconds and then turn it back OFF by using the same method. This option can vary depending on the device you are using. For some devices, you need to go to settings or use the power button on the phone to get to Airplane Mode. After applying this method, you can now try updating or setting up the voicemail greeting on your phone.