Hello! I searched but couldn't find an option to change the call sign. A search on the Anatel website( https://sistemas.anatel.gov.br/easp/Novo/ConsultaIndicativo/Tela.asp ) You will see that the PU6LAS call sign is no longer active. The same search for PU6MLG will show that it is assigned to my first and last name registered on the platform. Thanks.
Make your request to change here: https://forums.qrz.com/index.php?forums/add-my-call-sign-to-qrz-database-helpers-forum.121/