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process, please exit the firmware update. After exiting, please create a new folder named
“Zeroner” under the root directory of the file management of the phone system (the creation of
such folder in other directories may cause the update failure), then turn off the Bluetooth of phone
system and turn on again, and reconnect App and the bracelet, and finally tap on firmware update.
c. If you have already created the new folder of "Zeroner" in your phone system for firmware
upgrading, but the Zeroner Health App upgrade page still shows "Version detecting" or "Firmware
downloading", please change the mobile phone network, and then connect the Zeroner Health App
to the bracelet again for updating. If the upgrading is still failed after the above operations, it is
recommended to upgrade on another mobile phone.
d. If the white indicator of the bracelet is always on, which is caused by the forced drop-out or
other factors like compatibility during the upgrading process, but the bracelet still cannot be
turned on, and in the device list of Zeroner Health App, you can find the device named "i5 +
-DFU3", and in the Bluetooth of the phone system, you can also find the device named "i5 +
-DFU3".
Please DO NOT uninstall
Zeroner Health App and please clear the data. What you
should do at this time is to: open Zeroner Health App, find the menu bar of "help" and select the
fourth step of "firmware first-aid kit". Click and wait a moment until the screen shows the
progress bar of "upgrading".
B. Using iOS devices for firmware upgrading
a. If the bracelet is entered into the DFU state due to upgrading, do not uninstall Zeroner Health
App, and please find the "Bracelet Upgrade Assistant" in the "Help" menu in App.
b. If you still cannot complete the upgrading after performing the above methods, select "Contact
Customer Service" in App to resolve.