It didn't work. At least with TIM Brasil. I had to manually configure it.
It works on ICS After updating my tab to ICS it stopped working, but there is an easy fix : transform it to a system application using Titanium backup, of course you must be rooted to do that. After that you can start it and set the APN's of your carrier. The process is described for other APN application but it works fine on APN Brasil Pro too. Yesterday a message was sent to the developer but no reply from him until now. Enjoy, it's a very useful app.
Worked like a charm for my galaxy S captivate (i897) with TIM in sao paulo city. Thank you!
Nao funcionou. Pelo contrario, deu um pau geral no celular todo. Agora nem a internet funciona mais. Desconfigurou meu Atrix todo.
Working on ICS. Just use Titanium to convert as system app. *root* needed.