Updates & Downloads
Forerunner 645 software version 6.40
as of November 14, 2019
(4.07 MB)
Notes:
- WARNING: If this software is uploaded to a device other than that for which it is designed, you will not be able to operate that device.
- If attempts to upload software fail, you may need to return the device to Garmin® for service.
Change History
Changes made from version 6.20 to 6.40:
- Fix a lockup that could occur when saving an activity.
- Various CIQ improvements.
- Various stability improvements.
Changes made from version 5.90 to 6.20:
- Fix crash that could occur while using the device in Hebrew.
- Improve phone connectivity.
Changes made from version 4.20 to 5.90:
- Add support for Incident Detection and Assistance.
- Enable phone position injection to improve GPS fix times after moving long distances.
- Wallet Improvements
- Correct an issue where Treadmill Calibration could give incorrect values.
- Correct an issue where the Garmin Coach widget could become inaccessible.
- Fixed an issue where one couldn't race an activity from the activity history menu.
- Fixed an issue where the device will reboot if using Broadcast Heart Rate with the system language set to Russian.
- CIQ Improvements
- Fix occasional freeze that could occur while saving an activity.
- Various stability improvements.
Changes made from version 4.10 to 4.20:
- Fixed an issue where the sunrise and sunset times in New Zealand were not using daylight savings
- Fixed an issue where non-GPS activities were being displayed in the Navigation menu.
- Fixed an issue where certain CIQ watchfaces were displaying the incorrect date.
- Fixed an issue with backlight level when using Flashlight.
Changes made from version 4.00 to 4.10:
- Fix shutdown that occurred when using the music widget
- Changes made to support manufacturing
Changes made from version 3.70 to 4.00:
- Fixed an issue where the device could crash while using Garmin Pay.
- Fixed an intermittent issue where the display length during a pool swim could show invalid values.
- Fixed several CIQ 3.0 issues.
- Added Galileo Support
- Added Color Emojis
Changes made from version 3.40 to 3.70:
- CIQ 3.0 Support
- Add Altimeter pages and manual calibration
- Add text reply signature
- Fixed issue related to adaptive training plans
- Treadmill calibration improvements
- Fixed several other minor issues
- Translations Updates
Changes made from version 3.30 to 3.40:
- Added abnormal heart rate alerts. Enable these in Heart Rate widget > Heart Rate options > Abnormal HR alert. An abnormal heart rate will be detected if your heart rate exceeds the entered threshold for an extended period of time while sedentary.
- Correct an issue where CIQ Apps were not properly deleted from device.
- Correct an issue that could reset device if using specific text language files.
- Updated Translations
- Various Bug Fixes
Changes made from version 3.10 to 3.30:
- Added Physio TrueUp support. Physio TrueUp syncs activities done on other Garmin devices, allowing your device to more accurately reflect your training status and fitness. Activities from other devices will appear in the Activities menu, and they will update your Totals for Running, Cycling, and Swimming. Your Training Status, Training Load, and VO2 Max will be updated using activities from your other devices, and your Recovery Time will be also updated using data from other devices supporting Physio TrueUp. Enable Physio TrueUp in Settings > Physiological Metrics on the device or in Device Settings on Garmin Connect Mobile.
- Added support for REM sleep phase detection and improved the accuracy of the existing sleep algorithm.
- New Beta Feature! Extended Display will allow you to display your data screens on your Garmin Edge during a biking activity. Enable Extended Display mode on a supported Edge, and pair it to your watch as an Extended Display sensor.
- Updated Translations
- Various Bug Fixes
Changes made from version 2.50 to 3.10:
- Correct issue that could cause rapid battery drain
- Resting Heart Rate Improvements
- Wifi improvements when searching for networks
- Fix potential issue that could reset the device during an activity
- Updated Translations
Changes made from version 2.40 to 2.50:
- Added Trail Run
- Improved Floors Climbed Algorithm
- Improved Absolute Elevation Calculation
- Improved Rep Counting UI
- Updated Translations
- Changes to Support Factory
- Numerous Other Fixes