Dialing telephone calls from Guinea-Bissau to Saint Helena
00
▶ 290
▶ city code
▶ local number
Step-by-step
00
▼ This IDD (International Direct Dial) prefix tells the phone system in Guinea-Bissau that you are dialing an international number.
290
▼ Country code for Saint Helena.
city code
▼ local number
Notes
If you are calling from a hotel or office phone system, additional steps may be required.