Thread: Forerunner 645 software summary

Forerunner 645 software version 3.10
as of April 25, 2018

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Use Garmin Express to install this file.

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

Forerunner 645 software version 3.30
as of June 4, 2018

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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.
• 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

Forerunner 645, Sensor Hub Software software version 6.30
as of June 6, 2018

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(445 KB)

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Forerunner 645 software version 3.70
as of August 16, 2018

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(3.99 MB)

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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

Forerunner 645 software version 4.00
as of October 6, 2018

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(3.99 MB)

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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

Forerunner 645 Beta software version 4.02 Beta
as of October 29, 2018

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Changes made from version 4.00 to 4.02:
� Fix an issue that occurred when using the music widget to control music from the phone.

Forerunner 645 software version 4.10
as of November 5, 2018

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(3.99 MB)

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Changes made from version 4.00 to 4.10:
� Fix shutdown that occurred when using the music widget
� Changes made to support manufacturing

Forerunner 645 software version 4.20
as of November 28, 2018

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(3.99 MB)

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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.

Forerunner 645 Beta software version 5.17 Beta
as of April 17, 2019

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Changes made from version 4.20 to 5.17:
� Improved sensor pairing experience.
� Fixed rare crash that could occur when powering on unit.
� Various stability improvements.

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