It's 1616 my friend and any other info you might need for future ref
To switch off Voicemail dial 1626
To listen to Voicemail messages dial 443
Voicemail costs 8p per call if you do not have a live goodybag or it will deduct 1 minute per call from your goodybag minutes allowance.
When you join giffgaff, your voicemail is automatically switched on. You can access your giffgaff voicemail the following way:
Dial 443 (spells GIF) from your mobile phone to reach the voicemail
Leave a personalised message - this is the message your callers will hear when you're not able to take their call
Set up a PIN - this protects your voicemail. You'll need to know your PIN to access your voicemail from another phone, also sometimes* when you're overseas
to change to text notifications
Press * to get to the main menu
Press 4 for Mailbox Settings
Press 1 for Notification options
Press 1 to enable text notification
When you're listening to your message, you'll be given the option to press 8 for message detail
Press 1 to replay the message.
Press 2 to save the message.
Press 3 to delete the message.
Press 8 to hear the message details (number, date and time of call)
To change Voicemail answer time dial: **61*443*10*xx# where xx is the number of seconds - but can only be 05, 10, 15, 20, 25 or 30
More useful information about voicemailhttp://community.giffgaff.com/t5/Using-giffgaff/Your-voicemail/ta-p/3521085