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If you use the "Thanks" button we can see what you have downloaded and if you have
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your device as you were advised in August 2023.

The 2020 maps you say work are most probably NT maps as they have a CP 1252 they will work without patching as your device has a MSV: Weak
Maybe consider just using the latest
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Montana 610/680 | 2299 | 330 | MAP: Yes | GMA: Yes | MSV: Weak | GVS: --- | File: Montana610_680_350.gcd

Legend:


MAP: Yes - it verifies the presence of a valid unlock code, to unlock an .img you can simply use JetMouse keygen.
GMA: Yes - it verifies the FID limit (2200) and the presence of a valid *.gma, to unlock an .img you enough to use the old gimgunlock-0.03 (without MapSigPatch) or one of its derivative.
MSV: Weak - it verifies the validity of map signatures in a simple way, you can unlock an .img using gimgunlock-0.04 (without patching your firmware), but in case of unicode maps (CP65001) you must modify the CP value (see the Temporary authentication of Unicode maps*).
MSV: Strong - it verifies the validity of map signatures more complicated way, in this case you need to patch your firmware and unlock an .img using any correct unlocker.
GVS: Yes - it verifies the validity of firmware signatures, you have to use Updater.exe to install the patched firmware for the first time.