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Oi, which was once Brazil's fourth-largest mobile carrier, filed for judicial reorganization in 2016, selling its mobile division (Oi Móvel) in 2020 to a consortium formed by the three largest operators. In 2022, the sale was approved by the regulatory agency Anatel and Oi's 36.5 million mobile customers were transferred to TIM (40%), Claro ...
Oi Fixo (landline service, formerly Telefone Telemar) Oi Móvel (mobile service, cornerstone of the Oi brand) Oi Velox (ADSL, 3G formerly Velox) Oi Internet (ISP) 31 (long-distance and international calling) Oi Wi-Fi (Wi-Fi access, at home or via hotspots) Oi TV (DTH pay TV) Oi Voip (Voice over IP) In 2010, Portugal Telecom acquired 22.4% of Oi ...
A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA [1] mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks.
[1] [2] In countries where dual SIM phones are the norm, people who require only one SIM leave the second SIM slot empty. Dual SIM phones usually have two unique IMEI numbers, one for each SIM slot. Devices that use more than two SIM cards have also been developed and released, notably the LG A290 triple SIM phone, [ 3 ] and even handsets that ...
A typical SIM card (mini-SIM with micro-SIM cutout) A SIM card or SIM (Subscriber Identity Module) is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices (such as mobile phones and laptops).
Today, landline numbers usually use the number 3 at the beginning of the number. The use of the initial digit 2 is occasional except in Greater São Paulo and the state of Rio de Janeiro. The use of initial digit 4 is also occasional except in Greater São Paulo and digit 5 is only used in São Paulo and rural landlines using 57 prefix.
Telefônica Brasil, trading as Vivo, [3] is a Brazilian telecommunications group, subsidiary of Spanish Telefónica. It was originally formed as part of Telebrás, the state-owned telecom monopoly at the time. In 1998, Telebrás was demerged and privatized. Telefónica bought Telesp, the São Paulo division, and rebranded it to Telefónica. The ...
The National Telecommunications Agency (Portuguese: Agência Nacional de Telecomunicações) or Anatel is a special agency in Brazil created by the general telecommunications act (Law 9472, 16/07/1997) in 1997 and governed by Decree 2338 of 07/10/1997. [2]