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If there is an firmware update for your Charge HR, it should show at the top of your phone's Fitbit app. If there is a link there, just click on it, and it will download the update to your tracker. If there is no link at the top of your phone app, your tracker is probably already up to date.
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@Gwendolyn8 To add to @USAF-Larry instructions, I recommend checking out this help article titled: "How do I update my tracker?" Hope you find that useful!
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