Portuguese telecoms watchdog Autoridade Nacional de Comunicacoes (ANACOM) has approved the revocation of the right to use fixed wireless access (FWA) frequencies from Sonaecom-owned telco Optimus, Telecompaper reports. Optimus wants to return spectrum in the 24GHz-25GHz band, noting that it prefers to develop other broadband technologies instead. It expects to migrate all customers currently using its FWA-based services to new platforms by the end of this year. The revocation will come into effect on 31 December.