Claro, Oi, TIM e Vivo deveriam devolver faixa de 450 MHz, avalia especialista
Executive chairman da 450 MHz Alliance, Gösta Kallner, propõe releiloar espectro
24/09/2020 - 23:47
Executive chairman da 450 MHz Alliance, Gösta Kallner, propõe releiloar espectro