In 2002, Telemar launched its mobile communications brand, Oi, with its identity designed by Wolff Olins. The logo, resembles a speech bubble, used in many different shapes. In 2007, all their services rebranded under Oi, and in 2012, the company's corporate name was changed from Telemar Norte Leste S.A. to Oi S.A.
The lilac logos are used for Oi's services for businesses.
This version of the logo (and its variations) is used for some sponsorships, web-based radio station Oi FM and for Oi Rdio, the name under which Rdio was available in Brazil until the partnership ended in 2013 and Rdio took over the Brazilian operation.
Logo for Oi Futuro, Oi's corporate social responsibility arm.
In March 2016, Oi refreshed their existing brand by literally making it more flexible. The bubble that encases the brand name can now become freeform and comes in one of three possible graduated finishes. The final package of branding, co-designed by Wolff Olins and FutureBrand São Paulo, consists of about 70 variations (regarding each logo is restrained to it's given gradient as shown below).
Variation chart
2022–present[]
Due to a huge economical crisis in the latest years, Oi sold their mobile communications business and infrastructure to a consortium formed by Vivo, Tim and Claro in 2022. In April of the same year, the company was rebranded - with an updated logo, turning green their main color -, focusing on their fiber broadband services.
In 2025, Oi's fiber broadband customer base was sold to the operator V.tal, which founded a new company named Nio. In the same year, its satellite TV operation was acquired by Mileto Tecnologia, following an unsuccessful sale attempt to Sky Brasil in 2023.
On November 10, 2025, the Rio de Janeiro Court of Justice declared the telephone company bankrupt after 12 years of judicial reorganization. The company's debts totaled R$ 15 billion.
On November 14, 2025, the First Chamber of Private Law of the Court of Justice of Rio de Janeiro suspended the declaration of bankruptcy of Oi and ordered the resumption of the judicial reorganization process.
