First dial *85 and then enter your Voicemail PIN when prompted through the IVR.

Then, for accessing the custom greetings recordings submenu please press 0.

Then, use the following options as per your requirement

1) Press 1 to record your unavailable message.

2) Press 2 to record your busy message.

3) Press 3 to record your name.

4) Press 4 to manage your temporary greeting.

5) Press 5 to change your password.

6) Press * to return to the main menu.