Anatel isn't a Carrier, it's like a regulatory agency for telecomunications in Brazil.
The main Carriers in Brazil are: Vivo, Claro, TIM and Oi.
But your phone can be a Country Variant (CV) and is not liked with any carrier itself.
In Brazil were launched at least 3 CV Models that are:
059T5T0 RM-892 VAR LTA BR CV BLACK
059T9Z1 RM-892 VAR LTA BR CV MANAUS BLACK
059V013 RM-892 VAR LTA BR CV MANAUS WHITE
Unfortunatelly, only 059T5T0 RM-892 VAR LTA BR CV BLACK appears to be able to get Lumia Cyan Update until now.
I have the 059T9Z1 RM-892 VAR LTA BR CV MANAUS BLACK model, and until now, I got no luck on get this update