Thread: Nuvi55/56/65/66/25x9/26x9,zûmo590,GPSMAP64,Edge1000 cant authenticate map error

Originally Posted by Neil

You need to have V3.40 or earlier on a nuvi 65/66. See this post #367: [Only registered and activated users can see links. ]. To rollback firmware see here: [Only registered and activated users can see links. ].

Hi Neil , not sure whether is there any earlier version on Nuvi 68 to do the same as you mention here ?
Possible to rollback and use the unlocked map ?

Thank you .