Thread: Update firmware Montana 610

Originally Posted by Butters

@Giomen
Because it only has the 'weak' form of MSV there's no absolute need to patch the firmware (SW). I agree that's easiest solution, especially as Montana 6x0 doesn't have GSV so it can be done with just a patched GCD file, however he can still use the non-unicode City Navigator unlocked, or change the code page in a Unicode map from 65001 to 1251 and not have to patch SW in either case. My point is this: answering "SW must be patched" isn't totally correct as there are indeed other methods for M6x0 to use unlocked maps, which is what he asked in the initial post:
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Hi guys, thanks for the comments. The maps (CN Europe 2019.2 and Garmin Topo Pro GB) were unlocked with GU+IMG .004. Both are on a card in /garmin. Both run on the 600 but on the 61o I get "cannot authenticate maps"

If I understand correctly, the 610 doesn't have advanced protection (there is no gupdate.gcd file) and so the unit can't be patched. Yet the maps still don't run. Do I need to make another change to the unlocked mao .img? If so what, and what tools do I need?

Thanks again

Originally Posted by berin

....... on the 61o I get "cannot authenticate maps"

You get the 'cannot authenticate' message on the M610 even though the maps are 'unlocked' due to fw protection called 'MSV'. Sure they work on the M600 but they don't pass the authentication test on the M610. That's because the M600 doesn't have MSV (Map Signature Verification) whereas the M610 does have that protection (albeit the 'weak' form).

If I understand correctly, the 610 doesn't have advanced protection (there is no gupdate.gcd file) .....

Yes it has protection, but it's the 'weak' form as stated above. Additionally, the absence of the GCD means absolutely nothing in regard to that. Most outdoor devices auto delete the GCD file after it's been invoked anyway.

... and so the unit can't be patched.

Wrong. It's firmware can indeed be patched with the Universal Firmware Patcher by big-bang. Join Masters Section if you want to know more.

Yet the maps still don't run. Do I need to make another change to the unlocked mao .img? If so what, and what tools do I need?

The 'other change' is to use ImgTool to change the map IMG's Code Page. I don't think you fully understood my comments in Post #6. You can use unicode maps without patching fw for M610 if you're prepared to mess around a little, read this: [Only registered and activated users can see links. ]. That's only applicable for devices with weak form of MSV such as your M610. It's a bit of a kludge but you did ask if there was another method apart from patching fw.