Please tell us some basic information before asking for help:
Model Name: Zenfone 4
Rooted or not:
Frequency of Occurrence:
APP Name & APP Version (If your issue relates to the app):
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.
Câmera traseira e lanterna não funciona