The problem that I have reported previously, that thought was only an isolated case, it proved that is a lock to Jetmouse subscriptions, at least in my country. I Waited for reports and saw that the problem was repeated with forums users in my country. The symptoms are: inability to insert new subscriptions (the option is disabled in gps) and erasing the Jetmouse signature, but only when the parameters transmitted by RDS station match with the signature in gtm cable, if there is no transmission the signature remains intact. For example, in the screenshot below we can see a signature Naviteq Br 11/00/7/15 (Navteq, similar to the original but with parameters that are not transmitted in my region) and the lack of 11/00/7/14 (deleted by fw), this it essential to marry with the parameters transmitted and make data traffic tuning.

Seems to be that now the firmware identifies the ecc parameter (extended country code) transmitted by radio and if not find it, annuls the corresponding signature, seems surreal, but it is a fact, I tested several times and confirmed with other users. Indicative of this is that in previous firmwares (3.00 and below) the signature Jetmouse appeared with the ecc parameter, example: 11/a2/7/14. Now appears as "11/00/7/14" denoting that the ecc is not identified. In GTM26 and 36, the signature Jetmouse, different of the original, appears exactly in this way, without ecc, so Traffic does not work with the gps firmwares 2012 generation, but only with the previous firmwares (37xx, 24x0, 23x0 and 22x0, 1xxx), to maintain compatibility with GPS (and firmware) of the previous generation.
In short: arguably we have a Garmin firmware lock against Jetmouse signatures.

The question is how to reverse the process making a downgrade. With the help of Loly, I made several attempts, all generating a lot of instability. The firmware 2.80 and 2.90 does not revert the process. Only the v3.00 seems to have some effect, the only that allow to insert signatures, but unfortunately the system cancels the exact subscription that would make the tune traffic signal, as I said earlier. This can be due to weakness or inconsistency of the changes in the firmware version that I used. All original firmwares result in checksum FE and not zero, as would be expected. Loly helped very much, but could not, yet, find a solution. If Kunix or anyone who can help will be very much welcome.

I inserted in this cable numerous subscriptions, including the tests I did with the wildcard of Europe discovered by Loly. Now I am more than convinced that these signatures are not deleted, they remain on the cable, but inactive. It would be great if we discovered how to eliminate them, maybe a challenge for Jetmouse, if he is interested one day.Among the instabilities with the modified firmware, I noticed that sometimes appears Sys Ver 0 or 65535 (FFFFF) and in these moments I could install other versions. So it seems that changing correctly for version 0, allow easy installation of any version.


v3.10 GTM 25 in 3490
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Subscription 11/a2/7/14 killed
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sys ver 0 (FFFF)
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Other gtm25 in 1450
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Jetmouse Subscription killed
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