a) Power off your device and charge the device with a TCL official charger for at least 30 minutes, then try to power on again.
b) If the issue occurs while using a third-party app, make sure the app is compatible with your device and Android version. Try uninstalling the third-party app.
c) Try to reset or update your device. (Refer to Q How can I perform a factory reset on my device & Q How can I upgrade my device).
If the previously described options do not help, you can contact our hotline or repair center to get more professional technical assistance. Find the hotline or repair center information from the TCL website or APP “Support center”.
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