If you have DC-40, DC-30, or DC-20 collars, the collar updates download into your Handheld at the same time as the Handheld updates.
Then you just select the Collar you want to update and select "Update Dog Unit."Before you begin, you will need to go to Garmin's website and download their "Web Updater" software.
This process is painless, straightforward and the cheapest solution. You can determine whether you have the latest software by accessing your device's settings (usually done by tapping on the wrench icon).You can compare your settings to the latest ones listed on Garmin's Web site.Getting Official Garmin Map Updates Using Maps from Other Sources Community Q&A Before you go on a road trip, you may want to update the maps on your Garmin Nuvi GPS device so you have the latest map data and won’t get lost.
If you've purchased a map update or lifetime membership from Garmin, you can download map updates through the Garmin Express program.
With the Astro 430 and 320, Garmin has made it much easier.