Brazil’s Agência Nacional de Telecomunicações (ANATEL) has published Act No. 5885, dated April 29, 2026, establishing updated technical requirements and test procedures for the conformity assessment of internal signal reinforcing products — commonly known as signal boosters — for use in Personal Mobile Service (Serviço Móvel Pessoal, or SMP) networks. The Act took immediate effect upon publication on April 30, 2026, and simultaneously repealed the previous Act No. 2271, which had governed this product category since February 2022. Products that were previously homologated under Act No. 2271 may need to be reassessed for conformity with the updated criteria.
What Is Act No. 5885?
Act No. 5885 was approved by ANATEL’s Superintendência de Outorga e Recursos à Prestação (the agency’s grant and resource management division) and sets out the technical criteria that internal signal booster products must satisfy in order to receive certification and homologation for the Brazilian market. With this update, Brazil’s conformity assessment framework for these devices moves closer to practices adopted internationally, reflecting a drive toward greater regulatory harmonization.
Scope: Two Architectural Models
The new Act covers two distinct types of internal signal boosters under its technical requirements:
Selective (Provider-Specific) Boosters — devices that retransmit signals from a single SMP operator. These amplify only a licensed frequency sub-band, and must not amplify more than one SMP sub-band simultaneously.
Wideband Boosters — devices capable of operating with signals from multiple mobile operators. These must still operate in conformity with Brazil’s frequency allocation and channeling plan.
Both categories are subject to the updated certification and homologation requirements and must comply with Brazil’s frequency assignment and distribution plan for mobile services.
Key Technical Requirements
The revised Act introduces several mandatory technical features designed to protect network integrity and ensure safe, stable operation of boosters in indoor environments:
Self-Monitoring and Oscillation Control. Boosters must include automatic mechanisms to detect and mitigate signal feedback loops — a phenomenon analogous to audio feedback in a microphone-speaker system — which can cause harmful interference in mobile networks.
Automatic Gain Control. Devices must automatically regulate amplification capacity to prevent transmission power from exceeding regulatory limits.
Automatic Shutdown. Where a device cannot operate within ANATEL’s defined parameters, it must shut down transmission automatically, preventing it from becoming a source of interference.
Idle Timeout. Boosters must deactivate automatically after five minutes of inactivity — i.e., when no mobile devices are connected — and resume operation only when new demand arises. This minimises unnecessary transmission and reduces the risk of network disruption.
ANATEL states that the revised requirements are part of its broader initiatives to expand digital inclusion and improve the quality of mobile services across Brazil. The update is also linked to ANATEL’s Regulatory Sandbox, an experimental framework that allows municipalities to deploy signal boosters and repeaters to extend mobile coverage in underserved areas. Ensuring that devices operating within and outside the Sandbox meet robust technical standards helps protect network quality while enabling wider access. Manufacturers and suppliers of internal signal boosters for the Brazilian SMP market should review their current certifications and test documentation to ensure alignment with the new technical requirements.
To read the official notification, access below:
How C-PRAV Can Support You
C-PRAV supports manufacturers and suppliers with ANATEL certification in Brazil, including the homologation of signal boosters and other telecommunications equipment. Our team can assist you in assessing whether your products are affected by Act No. 5885, coordinating updated testing against the new technical requirements, and managing the end-to-end certification process to ensure continued market access.
Have questions? We’re here to help, or email us at gma@c-prav.com.