Thread: GTM36 and GTM26 problem with TMC on nuvi series 2xxx and 3xxx

I try with FW 7.00 and 6.60 but still show Connect 4G/HD.
How can we downgrade GTM FW,where is stored in GTM or in nuvi?
When i connect GTM25 on nuvi screen was writen updating TMC antene,but when i connect GTM36 nothing writen on screen.

p.s.
I found 2 different version of traffic provider.xml
On nuvi 3590 is v 2.90 on my nuvi 3490 is 2.80 but on garmin site is 2.70

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