Thread: Using TMC in Garmin nuvi for free

Angelozip,

My model is the Nuvi 855 with a GTM 20 receiver. I want to know the FID of a inactive subscription in my Nuvi so I can remove it, unless there is a way to remove the subscription without knowing it. I bought my receiver secondhand, which as advertised as having "lifetime traffic." Now I realize that the seller probably added the subscription himself and possibly mistyped an FID in doing so, resulting in a second inactive subscription. Whenever I go to the Traffic Settings page it warns me that I have a subscription that has not been activated. But I have no idea what it is for. There is no traffprovider.xml in my device and I inspected the regular garmin xml file, but it does not contain traffic information as far as I can see.

Accessing the Traffic firmware sounds good, but how do you access it? It appears to have some kind of serial link with the Nuvi, but no idea how to access the receiver.