To access your own voicemail from abroad you will need to dial your own mobile number.
The short number (121) that is usually used to access voicemail will not work from outside of the UK.
You will be charged the roaming call rate based on the country you are in. If you are in a Roam Like Home country it will be included in your minutes allowance. Our Roam Like Home includes 47 EU and European countries.
Please view our international price list to see any of the call charges for the country you are visiting. So that you don't get any surprises on your bill.