Guinea-Bissau Phone Numbers: Format, Area Code & Validation Guide - phone-number-standards -

Frequently Asked Questions

Mobile numbers in Guinea-Bissau are 8 digits long and start with '9'. The second digit identifies the network ('5' for Orange, '6' or '7' for MTN), followed by six additional digits. It's crucial for developers to prioritize mobile functionality given the limited landline infrastructure.
For calls within Guinea-Bissau, simply dial the full 8-digit number. There are no area codes within the country. Remember that mobile calls are much more reliable than landlines due to infrastructure limitations.
To call Guinea-Bissau internationally, dial your country's international access code (e.g., '+' or '011'), followed by Guinea-Bissau's country code (245), and then the 8-digit local number. Ensure the local number is in the correct 8-digit format.
Dial the international exit code '00', followed by the destination country code and the recipient's phone number. For instance, to call the UK, dial 00 44 and then the UK number. Be mindful of international call rates.
The country code for Guinea-Bissau is 245. When calling Guinea-Bissau from abroad, always include the country code after the international access code and before the local number.
The two primary mobile operators are Orange and MTN, with Orange having the strongest urban coverage, particularly in Bissau. MTN also provides good coverage in populated areas and is working on rural network expansion.
Guinea-Bissau's telecommunications landscape is mobile-centric due to damage to the fixed-line infrastructure during past conflicts. While some landlines exist, they are unreliable, making mobile the dominant communication method.
Consider satellite phones as a backup communication method, particularly for emergencies or when traveling outside major cities, due to potential network limitations and varying service reliability across the country.
2G coverage is extensive, while 3G is available in urban centers and main transport routes. 4G/LTE is currently limited to Bissau. VoIP services are available but performance depends on internet stability, which can vary. Several private ISPs offer dial-up and broadband internet.
Yes, VoIP services are available through major operators, but their performance relies on internet stability, which can fluctuate. Developers should optimize applications for various bandwidth conditions for optimal VoIP functionality.
Use regular expressions for precise validation, such as /^9[567]\d{6}$/ for mobile and /^44\d{6}$/ for landlines. This ensures accurate number formatting and validation within applications.
Guinea-Bissau's emergency response system is still developing, and direct dialing for emergency services may not be reliable. Pre-program important local contacts, including police, medical facilities, and your embassy.
ARCOM (Autoridade Reguladora Nacional - ARN) is the primary regulator for telecommunications. For the latest regulations and specifications, consult their official website. WATRA provides regional oversight and coordination.
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