Premise: The bike computer needs to stop recording
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Connect XOSS G/G+ to the XOSS app
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If it needs to upgrade the new firmware, it will prompt "Update"
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Tap Update Now
Firmware Upda Failed
Quit XOSS App.
Turn your Phone Bluetooth off/on phone settings.
Restart XOSS App and connect to your device.
Find the device whose name starts with DFU.
Tap the DFU device to update.
The firmware update prompts "Update Failed", and the bike computer shows DFU
It is recommended that you find Bluetooth in your phone settings and turn on it again, instead of sliding down the main screen to find Bluetooth or restart your phone.
If it still doesn't work, it is recommended that you could try to replace another phone to upgrade the firmware.
G/G+ keeps flashing DFU
If the computer screen flashes DFU and it cannot be turned off, you can try charging and restarting the computer when the battery runs out, and then connect the bike computer to XOSS APP to upgrade the firmware.
When the device is off, long press the left and right buttons at the same time until it turns on and then off.