Guinea-Bissau has seen significant growth in its telecommunications sector over recent years. As of the latest data, the country has approximately 1.5 million mobile phone users. This represents a substantial portion of the population, given Guinea-Bissau's total population of around 2.2 million people. Mobile phone penetration is high, indicating the widespread use of mobile devices for communication and access to services. In addition to USSD, WhatsApp and SMS are widely utilized for marketing and communication purposes. Businesses across Guinea-Bissau use WhatsApp for direct customer interaction, marketing campaigns, and customer support, thanks to its accessibility and cost-effectiveness. SMS marketing is also popular, with companies using it to send promotional messages, service updates, and alerts to their customers. Prominent businesses in Guinea-Bissau that use these communication tools include local retailers, service providers, and financial institutions.