Telefônica Brasil S. A. operates as a major telecommunications company in Brazil. The company delivers a wide array of services under its well-known Vivo brand. Its mobile offerings include voice communication text messaging and high speed data access across multiple generations of wireless technology. Fixed line services provide telephone connections for local long distance and international calls. Broadband internet is available through fiber optic copper and hybrid networks supporting speeds sufficient for modern digital applications. Pay TV services transmit video content via internet protocol to subscribers. The company also provides digital services such as video streaming platforms cloud storage solutions cybersecurity protections and financial technology products. These services are designed to meet the communication and entertainment needs of individual consumers and business enterprises. Telefônica Brasil S. A. maintains one of the most extensive retail and distribution networks in the Brazilian telecommunications industry to ensure widespread accessibility of its offerings.

Telefônica Brasil S. A. earns income from multiple interconnected business lines. The fixed line telephone segment handles local and long distance voice services for residential and commercial customers. Mobile services generate revenue from voice plans data packages and value added applications such as mobile entertainment and security features. Data services include fixed broadband subscriptions for homes and businesses as well as mobile internet access for smartphones and tablets. Pay TV contributes through monthly subscriptions for television channel packages delivered over internet protocol. Network services involve charging fees for the use of infrastructure like fiber ducts and cell tower space by other carriers. Wholesale services provide interconnection capabilities that enable seamless communication between different telecommunications networks. Digital services encompass over the top content platforms cloud based applications and online security tools. Corporate services offer customized solutions including dedicated connectivity managed IT services and specialized communication systems for enterprise clients. The sale of mobile devices and accessories such as smartphones tablets and related equipment represents another revenue stream.

Telefônica Brasil S. A. holds a leading position in the Brazilian telecommunications market. As of December 31, 2025 the company had a 38.1% market share in mobile services based on accesses and a 40.3% share in postpaid mobile services. In the fiber to the home segment the company reached 18.5% of total market share in Brazil. The company faces competition from other major operators including Claro and TIM in various regions of the country. In mobile services Telefônica Brasil S. A. leads in thirteen states: Amapá Amazonas Bahia Ceará Espírito Santo Mato Grosso Mato Grosso do Sul Minas Gerais Pará Rio Grande do Sul Roraima São Paulo and Sergipe. Claro leads in nine states: Acre Distrito Federal Goiás Maranhão Piauí Pernambuco Rio de Janeiro Rondônia and Tocantins. TIM leads in five states: Alagoas Paraná Paraíba Rio Grande do Norte and Santa Catarina.

Telefônica Brasil S. A. serves a diverse customer base across Brazil comprising individual consumers and business organizations. For individual users the company provides mobile telephony fixed line voice broadband internet and Pay TV subscriptions. Business customers benefit from services such as enterprise grade connectivity cloud computing cybersecurity protection and specialized communication solutions. As of December 31, 2025 the company had approximately 7.8 million fixed line broadband customers. The company's Pay TV service had around 733,292 active subscribers at the same date. Mobile services reached a significant portion of the population with 3G network coverage in 4,949 municipalities covering 97.5% of Brazil's inhabitants. Fourth generation long term evolution technology was available in 4,901 municipalities serving 97.0% of the population. Enhanced 4.5G coverage extended to 4,141 municipalities reaching 93.3% of Brazilians. Fifth generation technology was present in 716 municipalities equivalent to 67.7% of the national population. These figures demonstrate the company's widespread reach and ability to serve varied customer segments throughout the country.