Blocking unwanted calls generates dispute between operators at Anatel The dispute between telephone companies over a system created to prevent unwanted calls shows the difficulty in defining in which cases it is necessary to drop calls at their origin. At least seven companies contacted the National Telecommunications Agency (Anatel) to complain about legitimate calls dropped by Vivo's "anti-spam", which claims to block only those who make mass calls without identification. ?? Do you have any reporting suggestions? Send it to g1 The system promises to create an additional layer of protection against excessive connections. And, in some cases, it solves a problem that hasn't been solved even with tools like "Don't Disturb Me", created to put an end to telemarketing from operators and banks. But why are so many people still impacted by unwanted calls? The answer lies in the limitations of "Do Not Disturb Me", the possibility of tampering with originating numbers and the transition period of a system that can at least put an end to fraudulent calls. Unwanted automatic calls, called "robocalls" Fantastic Named "Verified Origin", it performs real-time authentication of calls and guarantees that the number displayed on your cell phone is, in fact, from a legitimate company. The system authenticated 6.6 billion calls in June 2026, according to ABR Telecom. Anatel requires companies that make more than 500,000 calls per month to join the system. But the requirement for everyone to use the tool will only begin in 2028. (learn more at the end) Meanwhile, consumers who want to avoid excessive calls can adhere to existing systems, resources available on their cell phone systems and third-party applications. (see below how to do it) 23 thousand calls per second: Fantástico investigates how robots programmed to get you off your feet work Why are unwanted calls so common? Many unwanted calls are automated and do not have a person on the other end of the line. Known as "robocalls", these calls go silent and drop out on their own after a few seconds. This happens because companies call several numbers at the same time: when someone answers, the other calls are terminated. The strategy is also used for call centers to check numbers that are active and enrich their contact lists. Brazil had more than 10 billion "robocalls" per month in 2025 Why we receive silent calls that hang up on their own – and how to avoid them Authors of excessive calls even tamper with their numbers so that they resemble those on common telephone lines and are not blocked by operators. This is called "numeric spoofing", which can be done through VoIP servers (acronym in English for "Voice over Internet Protocol"), computer programs that connect to the telephone network via the internet. VoIP servers are used to manage company extensions, but the possibility of changing the originating number attracts people with undue interests. Anatel even created the prefix 0303 to identify telemarketing calls, but removed the requirement after noticing a high level of rejection of this type of call. End of the 0303 prefix requirement for telemarketing was criticized by Procons and Idec Calls from similar numbers: understand how tampered calls are made How to reduce unwanted calls "Don't Disturb Me" promises to put an end to unwanted calls from all telephone companies, required to adapt to the system, and from 74 financial institutions, which joined the program voluntarily. Registration can be done on the website www.naomeperturbe.com.br and becomes valid within 30 days. But remember: some calls may continue to happen because scammers and some sales companies ignore registration. 'Do Not Disturb Me' doesn't work? Why people receive telemarketing calls Some Android phones have features to identify and block suspicious calls. The tool is usually found by accessing the "Settings" page and searching for "ID Protection" or "Spam". The iPhone, in turn, has the "Ask reason for call" feature, which causes all calls to be automatically answered by a robot (learn more here). An alternative is to download caller ID apps like Whoscall and Truecaller, which can show you who is actually calling and block calls. Services may charge for advanced features. As a last resort, the solution is to block calls from unknown numbers. This measure eliminates the problem, but it can make you miss really important calls. Anatel also advises consumers to register complaints if the problem is not resolved. The complaint can be made via this link. The agency also recommends the platform "Qual Empresa Me Called", which allows you to check the name and CNPJ of the person who made the call. Visit www.qualempresameligou.com.br, enter the number, click on "I'm human" and select "Consult". What's next? "Verified Origin" is Anatel's bet against abusive connections. It operates on two fronts: authentication, with a verification seal on legitimate calls, and identification, which shows the company's name and logo, in addition to the reason for the call. The system uses the international STIR/SHAKEN protocol, which analyzes the number calling from the ABR Telecom database, an association that brings together operators. From October 2028, authentication will be mandatory for all business-to-consumer calls. Identification with the company name and logo will be optional. Today, "Origem Verificado" has 63 partner telephone companies, including Vivo, Claro, TIM and Algar. Anatel predicts that, with the deadline approaching, half of company calls will be authenticated. The service is free for customers, who need to have their cell phone connected to a 4G or 5G network and with one of these systems: iPhone with iOS 18.2