Dialing telephone calls from Singapore to Guinea-Bissau
001
▶ 245
▶ city code
▶ local number
Step-by-step
001
▼ This IDD (International Direct Dial) prefix tells the phone system in Singapore that you are dialing an international number.
245
▼ Country code for Guinea-Bissau.
city code
▼ local number
Notes
Not sure what time it is on the other end of the line? Look here for Guinea-Bissau time, date, and time zone information.
If you are calling from a hotel or office phone system, additional steps may be required.