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4 day turn around for the upgrade, however the firmware no longer supports waypoint info from my Garmin gps. Support has told me that they know and are working on it.

I love our 355, gps with great radio

Identical file, but if you need it signed off don't install. Head over to you friendly Garman Dealer!

When linked to a GPS they work great

Update will be posted here this week! https://www8.garmin.com/support/collection.jsp?product=010-01057-00