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  1.    HowTo - Patching Garmin Firmware via SD Pachage   HowTo - Patching Garmin Firmware via SD Pachage HowTo - Patching Garmin Firmware via SD Pachage
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    Help HowTo - Patching Garmin Firmware via SD Pachage

    HowTo - Patching Garmin Firmware via SD Pachage

    Many of the recent Garmin Devices have strong Firmware protections that do not allow the use of Unlocked Maps.
    These Firmware require .GMA Certificates (Garmin Maps Authentication) and have integrated the MSV (Map Signature Verification) system.
    Initially these protections were bypassed through the "unlocking" of the Maps with the Gimgunlock_v0.04 + MapSigPatch Tool which allowed to remove this protection for all types of Maps, with the exception of the NTU Maps (for which, up to this moment there was no remedy.
    A further "obstacle" inserted by Garmin in the most recent models and Firmware is that of the so-called GSV (Gcd Signature Verification) protection, ie a "signature" of the Firmware. This thing does NOT allow the loading of NON-original Firmware and only accepts .GCD files (the classic Firmware Update Files).

    The purpose of this Tutorial is to present a series of Tools that allows you to "remove" from your devices all the Protections listed above, allowing the use on devices of any Unlocked Map, including NTUs.

    I reserved a special Paragraph to JNX Patching (for Outdoor Devices only)

    In the attached .rar Archive you will find the Guide in PDF (HowTo - Patching Garmin Firmware via SD Pachage.pdf) and ALL Patching software named in the Guide.

    Special Tanks to ALL guys developers of these amazing Tools (most of them from gpspower.net)

    I preferred to create a New Discussion in order not to 'pollute' the existing ones
    MODs are free to do what they see fit

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    If you have any doubts and/or questions, use this discussion


    Thank you all
    FireFox58 Reviewed by FireFox58 on . HowTo - Patching Garmin Firmware via SD Pachage HowTo - Patching Garmin Firmware via SD Pachage Many of the recent Garmin Devices have strong Firmware protections that do not allow the use of Unlocked Maps. These Firmware require .GMA Certificates (Garmin Maps Authentication) and have integrated the MSV (Map Signature Verification) system. Initially these protections were bypassed through the "unlocking" of the Maps with the Gimgunlock_v0.04 + MapSigPatch Tool which allowed to remove this protection for all types of Maps, with the Rating: 5
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