Calling Samoa from the United States explained:

• 011 - US exit code; dial first for international calls made from the USA or Canada
• 685 - Country Code for Samoa
• Phone Number - 5 digits
• US to Samoa landlines international dialing format: 011 685 ?? ???

How to dial to Samoa cellular:

• dialing format for calls to a cell phone: 011 685 7?? ????

Starting digit for landlines on the main islands:

• Apia: 2, 3, 6
• Savaii: 5
• Upolu: 4