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  1. #1
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    Default Cannot unlock maps on a Nuvi 3790t and Oregon 450t

    Hello. I downloaded a few maps from this wonderful resourceful site and loaded the IMG maps to an SD card. I followed the directions by getting the unique number of the SD to unlock the card with a .UNL file. The maps work on my older Garmin devices (a Nuvi 250W and a really old StreetPilot c330) but when I try the same SD card in my just purchased Nuvi 3790t it gives a "cannot authenticate maps" error. The same problem occurs on my friends Oregon 450t device. These two devices are very new models so I'm thinking Garmin has some kind of new unlock procedure? Please help!

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  3. #2
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    catymag's Avatar
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    Default

    use this to unlock
    [Only registered and activated users can see links. ]
    new firmware need GMA file, if you dont have it ,maps will be locked

    moved to discussion section
    [Only registered and activated users can see links. ]
    [Only registered and activated users can see links. ]

    [Only registered and activated users can see links. ]
    You have to navigate to get to the good.
    Nuvi1250/Nuvi 34xx/Nuvi 2200/Nuvi 66/Oregon 600/Galaxy S5 MM 6.0.1/TomTom GO/iGO Nextgen Avic,Basar,Isr.Gift/Navigon
    Please don't flood my pm box with questions you can post on forum!! You won't hear back from me.

  4. #3
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    Default

    Is there an GMA generator available?

  5. #4
    ☼ADMIN☼
    catymag's Avatar
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    Quote Originally Posted by darkerbg View Post
    Is there an GMA generator available?
    no, not available, use Fast IMG unlocker
    [Only registered and activated users can see links. ]
    [Only registered and activated users can see links. ]

    [Only registered and activated users can see links. ]
    You have to navigate to get to the good.
    Nuvi1250/Nuvi 34xx/Nuvi 2200/Nuvi 66/Oregon 600/Galaxy S5 MM 6.0.1/TomTom GO/iGO Nextgen Avic,Basar,Isr.Gift/Navigon
    Please don't flood my pm box with questions you can post on forum!! You won't hear back from me.

  6. #5
    Junior Member
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    Oct 2010
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    San Francisco, Ca USA
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    Default

    Does the img unlocker removes features on the img or it just un locks it?. I read somewhere that some features are lost but can't seem to find that post now.

  7. #6
    ☼ADMIN☼
    catymag's Avatar
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    No features lost actually, once there had been problems with bluecharts but now all is solved
    [Only registered and activated users can see links. ]
    [Only registered and activated users can see links. ]

    [Only registered and activated users can see links. ]
    You have to navigate to get to the good.
    Nuvi1250/Nuvi 34xx/Nuvi 2200/Nuvi 66/Oregon 600/Galaxy S5 MM 6.0.1/TomTom GO/iGO Nextgen Avic,Basar,Isr.Gift/Navigon
    Please don't flood my pm box with questions you can post on forum!! You won't hear back from me.

 

 

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