To set WiFi on by default on your Android car, you can follow these steps:
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1. Open the Android car's Settings menu, which usually shows a gear-shaped icon on the home screen.
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2. In the Settings menu, find the \"Network and Internet\" option and click to enter.
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3. In the Network and Internet menu, find the \"WiFi\" option and click to enter.
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4. In the WiFi menu, find the \"Advanced\" option and click to enter.
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5. In the Advanced menu, find the option \"Connect automatically on startup\" and turn it on.
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6. You can then select the WiFi network you want to connect to and enter your password (if required).
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7. When the Settings are complete, exit the Settings menu and restart the Android car.
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Now, every time you start your Android car, it automatically connects to the WiFi network you've chosen. Please note that this may increase the battery consumption of the Android car, so it is recommended to turn it off when you do not need to connect to WiFi.