Please tell us some basic information before asking for help:
Model Name: ZS673KS
Firmware Version: WW 310810 1226.84
Rooted or not: no
Frequency of Occurrence: not working at all.
APP Name & APP Version (If your issue relates to the app): finger print and air triggers
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
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