Electronic devices seem to always come with several cords, or require the purchase of additional cords for communicating with computers. Fortunately, some Garmin GPS devices have an advanced method of updating without the need for a USB data cable or serial port.
Select the update from the Garmin website that you would like you GPS device to install.
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Choose the option that allows you to update via satellite and type in your Garmin GPS device serial number.
Wait for the GPS device to tell you your update is complete before turning off you GPS unit.