How do I set up my O2 Voicemail for overseas travel?

How do I set up my O2 Voicemail for overseas travel?

Aimed at:  Edinburgh Napier’s staff

Before leaving the UK dial 91780 from your handset, you will receive a text message with your personal Voicemail Retrieval Number. Save it to your address book so you have it to hand for all your trips abroad.

To do this whilst roaming dial +447802 090 100 and you will hear your number Voicemail Retrieval Number.