Hello there @Modjadji welcome aboard to the Fitbit Community! I have moved your post from our third party board to our Android, since the topic align more with the content of this forum.
Note that Huawei 10 is not listed yet as compatible. So, in these scenarios, the app may not work as is expected. For more details, please refer to our help article: Which phones and tablets can I use with my Fitbit watch or tracker?
I suggest setting up and syncing via a device listed as supported or using a computer as an alternative. Our team is always working to test and add more Android devices to the supported devices list, so keep an eye open for future updates!
See you around.
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