Look for "Settings" or "Call Settings".
Within Settings, find "Voicemail".
Inside the Voicemail settings, you might find an option like "Voicemail number", "Service", or "Setup" which will display the actual number your phone dials for voicemail.
Note: The exact path can vary slightly sri lanka phone number list between Android phone manufacturers (e.g., Samsung, Vivo, Xiaomi, Oppo) and Android versions.
On iPhones (iOS):
Open the Settings app.
Scroll down and tap on "Phone".
Tap on "Voicemail" or "Carrier Services" (depending on iOS version and carrier).
Your voicemail number might be displayed here, or you may find an option to "Change voicemail password" or "Set up voicemail," which implies the number is already configured.
3. Carrier-Specific Voicemail Numbers/Access (for Bangladesh):
While holding '1' usually works, some carriers have specific numbers or processes. Here are the common ones for major Bangladeshi operators if you need to dial from another phone or confirm:
Grameenphone (GP): Usually by holding '1' on your GP phone. The access number is typically associated with their voicemail service.
Robi: Similar to GP, holding '1' is standard.
Airtel (Bangladesh): Holding '1' is standard. Some older information might point to 132 for Airtel in other regions.
Teletalk: Holding '1' is generally used.