Samsung A660 - Manual (Page 57)

Section 2D: Controlling Your Roaming Experience 50
Checking for Voicemail Messages While Roaming
When you are roaming off the available network, you may not
receive on-phone notification of new voicemail messages. Callers
can still leave messages, but you will need to periodically check your
voicemail for new messages if you are in a roaming service area for
an extended period of time.
To check your voicemail while roaming:
1. Dial 1+area code+your wireless phone number.
2. When you hear your voicemail greeting, press .
3. Enter your pass code at the prompt and follow the voice
prompts.
When you return to the available network, voicemail notification
will resume as normal.