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  2. Telephone numbers in Brazil - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Brazil

    Despite this fact, mobile phones registered outside the 11–19 , 21, 22, 24 (Rio de Janeiro) and 27–28 (Espírito Santo) areas are usually displayed on WhatsApp (widely used by Brazilians to send text, voice and video messages due to the privileged access granted by mobile operators, in contrast to the assumption of network neutrality ...

  3. Oi (telecommunications) - Wikipedia

    en.wikipedia.org/wiki/Oi_(telecommunications)

    Oi Internet is an ISP that was launched in 2004. Oi Internet started services with a promotion that offered 31% off the dial-up connection costs on the subscriber's bill. However, Anatel, the Brazilian telecom regulator, did not allow this practice. Later, the ISP relaunched the promotion, offering 31% of the dial-up connection costs deposited ...

  4. File:Mapa de cobertura da Oi Fixo.svg - Wikipedia

    en.wikipedia.org/wiki/File:Mapa_de_cobertura_da...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate

  5. WhatsApp - Wikipedia

    en.wikipedia.org/wiki/WhatsApp

    WhatsApp (officially WhatsApp Messenger) is an instant messaging (IM) and voice-over-IP (VoIP) service owned by technology conglomerate Meta. [13] It allows users to send text, voice messages and video messages, [14] make voice and video calls, and share images, documents, user locations, and other content.

  6. Comparison of VoIP software - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_VoIP_software

    This is a comparison of voice over IP (VoIP) software that examines applications and systems used for conducting voice and multimedia communications across Internet Protocol (IP) networks. VoIP technology has transformed telecommunications by offering alternatives to traditional telephony systems while providing enhanced features and cost savings.

  7. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    From a landline, these are free. From cell phones, airtime is not covered, but there are no long-distance charges. In Chile, the toll-free prefix is "800" followed by a six-digit number. These numbers are called número 800 (800 number). These numbers cannot be accessed from abroad. In Colombia, toll-free numbers start with "018000".

  8. WhatsApp snooping scandal - Wikipedia

    en.wikipedia.org/wiki/WhatsApp_snooping_scandal

    The snooping scandal came out after WhatsApp filed a case in California's Northern District federal court against the NSO group, alleging the NSO group had developed the software used to infect 1,400 target devices with malware. [3] The IT Ministry of India sought a detailed response from WhatsApp on the issue. [4]

  9. Oi - Wikipedia

    en.wikipedia.org/wiki/Oi

    Oi (digraph), a Latin-script digraph; Oi (interjection), an interjection used to get someone's attention, or to express surprise or disapproval; Oi language, a Mon–Khmer dialect cluster of southern Laos; Gha, a letter (Ƣ ƣ) erroneously referred to by Unicode as "oi"