Calling Guinea-Bissau from the United States explained:

• 011 - US exit code; dial first for international calls made from the USA or Canada
• 245 - Country Code for Guinea-Bissau
• Phone Number - 7 digits
• US to Guinea-Bissau landlines international dialing format: 011 245 3?? ????

How to dial to Guinea-Bissau cellular:

• dialing format for calls to a cell phone: 011 245 X?? ????
• X can be 5, 6 or 7

Phone Books:

• Yellow Pages of Africa - currently offline