Lolypop, I've tested the trafficprovider.xml without ecc and traffic did not work (1300 with GTM 25 and 3490 with GTM36), but that does not means much, because seems that involves a more complex set of variables than simply adding or removing the ecc of the trafficproviders to enable Traffic. These variables have to do with determining the group of receivers TMC GTM 10/12 - 20/21 - 25/35 and 26/36/60; firmware traditional (USA different of Asia), new fw versions 2012 and the codes transmitted by the TMC radio station of the country. For example, the same model of GPS (and firmware), as the nuvi 2xx with GTM 25 receiver, tunes Traffic in the United States but not in my country. The same GTM25 with JetMouse signature works perfectly with models 1xxx, 2xxx, 3xxx in my coutry with USA firmware.
I also did tests with a firmware of nuvi 1360 Japanese on a Nuvi 1390, who worked in my country with the same GTM25 but was not compatible with the GTM26 (mismatch warning when connecting the cable GTM). Anyway, I can safely say that trafficprovider without ecc does not work in my country with Nuvis 1xxx, 2xxx, 3xxx with GTM 25 and 26, but exist until the possibility to work in another country where there is compatibility with codes TMC of local radio. I will analyze a few screens that have saved and subsequently publish the material to discuss.