What plane is this? It's a taildragger, 4 blade prop, twin engine plane. The photo was taken approximately in 1948, maybe in Brazil?
The airliner in the picture is a Vickers VC.1 Viking, registration LV-AFI, of the former Argentinian operator Flota Aérea Mercante Argentina.
According to this source, the plane served the Secretaría de Aeronáutica under registration LV-XFJ for less than a month, from 10.9.1947 till 4.10.1947 before transferring to FAMA.
After FAMA, the plane in question served Fuerza Aérea Argentina from 4.5.1949 till 11.11.1951 under registrations T-80 and T-50.
Wikipedia: Flota Aérea Mercante Argentina (in Spanish)