Used that new simple method today and it worked great.   Took about an hour to download and write to the USB drive, and 25 minutes to update the car.   I'm now on Sync 3.4 and maps updated from NA 1 18 to NA 2 20   Have you updated your APIM firmware to get features like radio logos and calm screen?   https://community.cyanlabs.net/t/updating-apim-firmware-calibration-files/17
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