(2.09 MB)

View installation instructions and system requirementsUse Garmin Express to install this file.

Use Garmin Express to install this file.

Changes made from version 3.20 Stable to 3.50 Stable:

  • Added support for Connect IQ 1.3.0 SDK. See the Connect IQ 1.3.0 SDK for a list of new features.
  • Added support for Apple Media Service – users can now control any active music player, e.g. Spotify, as well as volume. (requires iOS 8.0 and higher)
  • Added support for phone apps to subscribe for more frequent data updates.
  • Added support for the dog tracker widget. (Settings > Widgets > DogTrack)
  • Added support for broadcasting wrist heart rate data over ANT to other devices during an activity. (Settings > Sensors > Wrist Heart Rate > Broadcast HR > In App)
  • Improved wrist heart rate performance. (Requires WHR 2.70)
  • Improved the accuracy of pace data for paddle sports.
  • Improved how sleep movement could impact intensity minutes calculations.
  • Improved the responsiveness of floors climbed data.
  • Fixed potential issues with golf scorecards and summary information.
  • Fixed an issue with the intensity minutes widget potentially showing dashes for high intensity minute values.
  • Fixed a potential issue with access to navigation while running a Connect IQ app.
  • Fixed a potential issue with access to app settings while running a Connect IQ app.
  • Fixed a potential issue with the backlight failing to turn on when using the LIGHT key.
  • Fixed an issue where calorie data was not being recorded correctly on the subsequent activity, after using an HRM-Tri or HRM-Swim.
  • Fixed a potential issue with swim workouts.


  • Installation Instructions
  1. Connect your fenix 3 HR to your computer using the USB cable. Download and unzip
  2. Place the GUPDATE.RGN file in the GARMIN directory
  3. Copy and paste the ‚TEXT‘ folder in the GARMIN directory. Choose ‚Yes‘ when asked if you’d like to copy this new folder over the current TEXT folder.
  4. Disconnect from your computer and proceed through the update.
  5. If you would like to revert to the last public release software, follow the above steps, but place the gupdate_3.20.rgn file in the GARMIN folder. Rename the file to gupdate.rgn before disconnecting your device. NOTE: If you revert to an older version of software, all of your settings will be reset to Defaults.

  • System requirements
  1. IBM-compatible PC running Windows XP or later operating system and an available USB port.