Thread: Using TMC in Garmin nuvi for free

I believe the only way find the FIDs for subscriptions that have already been added to the Traffic Receiver is to access the firmware of the receiver GTMxx and find the key with some hex editor. The problem is how to access or copy this firmware. With this key in hand, we find the parameters with the InfoUC tool. On the other hand, if your intention is to get the FID to enter new signature, this path may be wrong. If the signature is listed as inactive and Nonamed, meaningful that GTMxx or GPS are incompatibility with the key of the country. If you want to use the Traffic in your country, try to find the parameters at the beginning of this topic and generate the key with the jetmouse. If not found, there are no easy methods to deduce the FID and other parameters from the file trafficprovider.xml and FM Table. I think you should first say what their purpose is, what country to use the Traffic and yours models of GPS and GTM.