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How to Update the Software/Firmware on a Flight Stream
To update the software/firmware on a Flight Stream 110, Flight Stream 210 or Flight Stream 510, please visit your local Garmin Dealer. To find a Garmin Dealer, follow this link that will take you to the Dealer Locator page: https://www.garmin.com/dealerlocator/
On the Dealer Locator page, make sure you select "Aviation" under Product Category. Then, you can enter your city, state, zip code, or even country, depending of your location.