which of these is ur service provider? service providers in brazil are : TIM OI Claro Sercomtel telemig celular which one of these and i will help u
try this code #pw+453227276124433+7# how to use remove simm card and power on phone enter code provided use the star key(*) to get the p and w and + signs by pressin it quickly and you'll get it please only TRY ONCE if u get ERROR STOP come back and tell me please verify the code before entering the last digit on your phone please reply and say if it works
sorry to hear your mobile provider will unlock it for u visit them... or purchase an unlock cable onlne and do it yourself of try visiting a few phone shops and see if they can do it for u