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  1. #351
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    I had the same problem updating my Nuvi 55LM; I tried to downgrade the software to version 3.40, but even getting the msg to confirm the installation of a version older than installed it didn't work; I copied the earlier version to "garmim\.system" replacing teh file "GUPDATE.GCD" and changed the "GarminDevice.XML", but I'm always with the version 4.30.
    Does anyone have a "trick" to achieve the downgrade? Thanks.

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  3. #352
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    Quote Originally Posted by Baraob View Post
    I had the same problem updating my Nuvi 55LM; I tried to downgrade the software to version 3.40, but even getting the msg to confirm the installation of a version older than installed it didn't work; I copied the earlier version to "garmim\.system" replacing teh file "GUPDATE.GCD" and changed the "GarminDevice.XML", but I'm always with the version 4.30.
    Does anyone have a "trick" to achieve the downgrade? Thanks.
    The trick is in linked thread in post 346
    [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. #353
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    Quote Originally Posted by Baraob View Post
    I had the same problem updating my Nuvi 55LM; I tried to downgrade the software to version 3.40, but even getting the msg to confirm the installation of a version older than installed it didn't work; I copied the earlier version to "garmim\.system" replacing teh file "GUPDATE.GCD" and changed the "GarminDevice.XML", but I'm always with the version 4.30.
    Does anyone have a "trick" to achieve the downgrade? Thanks.
    I was able to downgrade my nuvi 55 to version 3.20.

    try to download it from this link
    Code:
    Please Login or Register to see the links
    after that change it`s name to GUPDATE.GCD and past it in .system folder and also make sure to remove the old one.
    after that once to started the device you will get the conformation msg to downgrade the version.

    this what happened to me.

  5. #354
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    Dears ShammfOr and Catymag

    Thanks a lot for your help. The problem I had was trying to downgrade to version 3.40 that I found in the same link you sent me. There is a problem in that directory because the files are not all sorted and I found only versions 3.40 and 4.30; I tried to use version 3.40 and it seems that there's an error on it, it doesn't install and maintain original GCD file.
    With the version you sent me (3.20) it worked well and the maps work again.

    Thanks again.

    Baraob

  6. #355
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    Quote Originally Posted by catymag View Post

    New gimgunlock-0.03+MapSigPatch - Windows version Latest release
    As usual drag&drop the img in it to unlock it.
    In post #256
    It unlocks NT (not NTU) IMGs in 2014 devices, but not working with all new devices 2xx9 and probably in most of newer devices firmware,
    If you have 2xx7 (8) (PartNumber> 006-B1582-00), works
    If you have 2xx7 (8) (PartNumber> 006-B2077-00), doesn't work.
    =========================================
    who now what is part number for GPS nüvi® 2597LMT at Coscto store:


    Spoiler: here
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  7. #356
    Garmin/GPS Systems GMod.

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    You'll not get a different answer to what Caty & i told you previously in that thread you started [unless someone is psychic lol]. We can't tell from looking at an on-line advert blurb, if you can't go back to the actual store then ring them to talk a sales clerk thru checking the hwid and if it shows B1582-00 in the hidden menu ask them to either hold that same one for you or send it.
    Quote Originally Posted by quebec001 View Post
    I dont have this nuvi, i saw this nuvi at costco store!
    Quote Originally Posted by Neil View Post
    You can also check the HWID on the unit in the store if Costco will let you handle it, see this post from earlier today: [Only registered and activated users can see links. ] [post #69].
    'Thanking Posts' are banned. To thank someone, and/or to see hidden links and content, use the [Only registered and activated users can see links. ] button below left of the helpful post then refresh your browser [F5 key]. 'Thanking Posts' are banned.
    Please don't spam. Posts serving no purpose other than to thank or to ask about hidden links are trashed or deleted, it's GPSPower's policy. Please don't spam.
    [Only registered and activated users can see links. ] should make their first post as a new Intro Thread in [Only registered and activated users can see links. ].

  8. #357
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    Garmin 66LMT doesn't work even with free maps (i.e. map of Belarus) after firmware update up to 4.30. Hence I had to downgrade firmware to 3.40 back.

  9. #358
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    Quote Originally Posted by Virin1973 View Post
    Garmin 66LMT doesn't work even with free maps (i.e. map of Belarus) after firmware update up to 4.30. Hence I had to downgrade firmware to 3.40 back.
    Am I correct inmy assumption that the map of Belarus you refer to is an NTU map? If so, the statement by catymag in post #1 and post #256 is applicable:

    Quote Originally Posted by catymag View Post
    It unlocks NT (not NTU) IMGs in 2014 devices, but not working with all new devices 2xx9 and probably in most of newer devices firmware,
    Nüvi 55, 56, 65 and 66 are some of the devices that fall into this category.

  10. #359
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    Quote Originally Posted by smokefree View Post
    Am I correct inmy assumption that the map of Belarus you refer to is an NTU map?
    Map of Belarus is usual and not-locked NT map. But it was compiled with "free" version of MPC. Garmin prevent using of this map in new SW after claim of russian distributor.
    Love your wife? Buy yourself a GPS for answering to her favorite question: "Dear, where are you?".

  11. #360
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    Giomen, sorry for my stupid question, but would you pleased to tell me what is "MPC"? And what about the claim of russian distributor (navicom?), where can I read this about?
    I have the same problem with map of Belarus on my nuvi 2597LMT (HWID B2077, of course).

 

 
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