Navfree: como instalo el mapa del peru en mi samsung galaxy III

(I'll reply in English in the first instance because my Spanish is not good)

Navfree is made by a company called NavMii. Although it's a program that uses OpenStreetMap data, it's not part of the project, so no-one here can influence what maps are available for NavFree or when.

As a bit of background, Navfree do have a FAQ entry that says "Why isn’t there a map for my country?" which lists the countries available, and Peru in not on that list.

Nevmii also have a uservoice page (a customer feedback mechanism) on which someone's asked "Please make it possible that users can download their respective regional maps". Someone from NavMii has answered:

But with regard to downloading data from OpenStreetMap… No can do The OSM data must be compiled and heavily optimised. Our compilers are propriatary and are likely to remain so for the forseeable future.

So it's not good news - it doesn't look like you'll be able to get a map of Peru from Navfree any time soon.

However, there are a large number of other Android apps available, some of which may provide the features that you're looking for. I don't have an Android phone myself, so can't recommend a particular one. In addition, lots of questions here mention Android, so reading through the answers to those may also help.