To listen to your emails just call your regional dial in number from your mobile or fixed line phone.
You will be prompted to enter your user code and PIN numbers, or just your PIN number if you are calling from a registered phone.
The following diagram illustrates the call process:
 | 91 120 18 15
|
 | 0207 099 1977
|
When phoning from registered numbers you will only be asked to confirm your
PIN number, making the acccess to your mailbox even easier.