We can easily activate and setup voice mail in Optus mobile through the following methods. Expand one of the following method to know more about the procedure to activate voice mail. > Through SMS: Activating Voice mail : Send a sms from your Optus mobile 8 to 9999 You will receive a sms to confirm the action to activate voice mail Send confirmation sms in requested format Setting up Voice mail : Dial 321 from your Optus mobile and follow the computer voice Record your welcome message for voice mail Choose to change a PIN code. A starting new PIN will be send to your mobile as SMS. Access Your Voice mail : Dial 321 and enter your PIN to hear Voice messages. > Through Toll free call: Activating Voice mail : Dial 1509 from your OPTUS mobile phone Select Voice mail option to activate it Once activated you have to set up voice mail. Setting up Voice mail : Dial 321 from your Optus mobile and follow the c