Va cataloguarte.
No budget? No problem! All you have to do is bring a mobile device and a passport.
The Ministry of Telecommunications and Information, the National Telecommunity Agency, the Civil Aviation Authority of Brazil, and the National Institute of Indo-Brazilian Relations (INBI) are working in cooperation to create a special version for voice calls over the Internet.
It’s called Telecoms Electronica.
http://www.indignitypolicy.com/2013/03/a-few-reasons-why-offering-to-say-brazil-would-fail-to.html