Thread: About 37xx converted to 34xx satellites reception accuracy

Originally Posted by kunix

This link says that 34xx has a bluetooth module paired with GPS module inside a single chip. But this doesn't necessarily mean that the new GPS module has a completely different firmware. There could be two modules (GPS and bluetooth) inside one chip accessible via separate interfaces. And "mt3328" string inside 34xx and 37xx firmwares suggests that it's probably true.

I had found stock e-mail for the first NUVIs 3490 (S/N 2BB******-2BC******) - all are with GM (mt3328 - like 37xx) and PCB V8 or V11 (O35 8GB). The all next generation devices have GT* (NL5500L) and PCB V7 (O36 8GB). Usually I request GarminError.xml from suppliers for determination of memory size .

Plus read -
Inside of SW:
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PCB description:
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