I just received my new GPSMAP 64st. I've been trying to install unlocked maps from this forum (eg [Only registered and activated users can see links. ]) by downloading the unlocked .img file and transfer it by USB to /GARMIN/gmapsupp.img. However, this fails every time and I keep getting "cannot authenticate maps" displayed when rebooting the device. I've also tried other maps, with the same issue.
Does anyone have any idea how to solve this?
You have to navigate to get to the good.
[Only registered and activated users can see links. ] Password for my files: gpspower.net
Please don't flood my pm box with questions you can post on forum!! You won't hear back from me.
Galaxy S5 Kitkat 4.4.2 / Nuvi1200->1250 / Nuvi3790T->34xx / Nuvi 2200 / Nuvi 66 / Oregon 600