Thread: Garmin PRO 550 Plus help please

Garmin PRO 550 FW 3.70
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Any device transmitting RF will need to comply with local frequency regulations ,as your device has a GPS it will most probably be GEO locked to the country of purchase.
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Spoiler: Software implies it is encrypted

Firmware version as specified in GCD file: 3.70 for Unknown device (HWID 3116).
Firmware version: 3.70 for Unknown device (HWID 3116).

Error: No patterns specified for this device.

Thanks Garman for your help.

It is outside the country of purchase and looks like I've just bought an expensive paperweight. Would this unit have encrypted firmware or could the region lock be fixed like a garmin Alplha can be, if it was compliant from an RF perspective?


Does anyone have any previous versions of the firmware for this unit?

Try this from Garmin.

They unit seems to stop working as soon as it gets GPS signal, Any help would be greatly appreciated.

Spoiler: Garmin Support

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Thanks asprin, tired that this morning and it’s still doing the same thing, when it gets a signal it just displays a big X on the screen