I have Garmin aera 500 and I want to change it's firmware to aera 550 ! The differencies between thouse devices is in some features like JCV , line assist and some aviation features, like safe taxi . I know, that some people has made this operation. Aera 5xx series has 1 firmware , but device choosing what kind of firmware to install ! I know, that I have to change something in firmware , but i don't know exactly what ?
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