One of the things that changes on a pretty regular basis is the Astro Software.
With the Astro 430 and 320, Garmin has made it much easier.
If you have T5 or DC-50 collars, you simply connect them directly to your computer via USB.
If you have chosen to accept an i OS software update in i Tunes that you immediately realize you do not want to actually install, you can stop the i OS update process in i Tunes by intervening quickly on a Mac or Windows PC.
Speed is important, if you hesitate too long after pressing the update buttons in i Tunes then it is quickly too late (depending on the side of the update download) and you’ll need to just let the update complete installation, possibly considering a downgrade.
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.Once the update is installing itself, you need to let it finish because trying to intervene mid-update is a recipe for making the i Phone, i Pad, or i Pod touch useless and require a full restore.Some versions of i OS can be downgraded after the fact, so that would be the next approach if you accidentally installed an update you didn’t want, you can learn more about downgrading system software here.Once found connect up and enter 1234 as the passcode at this point you need to find out what ‘Outgoing Com Port’ the bluetooth software has connected to the car kit on, this varies depending on the software some makes it easy others like keeping it a secret but you NEED to know!Once you know the com port, go to the Bury Update Manager and choose the correct com port and press Next (the program is now unzipping the repository) the Next button will need pressing again in a few seconds.Note this actually stops i Tunes from downloading the update and proceeding with the install, it doesn’t just stop the i OS update notification like what is available from on the device.