How to reset a Fitbit Alta to fix issues with the device, or erase your personal data

To reset your Fitbit Alta, you'll need to repeatedly press a button on your charger. But to wipe your data, you'll need to disconnect your account.

How to reset your Fitbit Flex to its factory settings using an official Flex charger and a paperclip

You can reset a Fitbit Flex to its factory settings as long as you have an official Flex charger and a paperclip or similar tool. Here's how to do it.
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Resetting Your Fitbit: When and How to Do It Right

Tap the Settings app (gear icon) on your Fitbit device. Tap About or Device Info (if you see these options). Next, select Clear User Data or Factory Reset. Depending on your device, you may be ...
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What Restarting Your Fitbit Actually Does—and How to Do It

Turning a Fitbit tracker off is different from a restart or a reset. A restart will turn the tracker off and on, within one ...