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https://www.pcmag.com/how-to/block-robocalls-and-spam-calls#:~:text=Some%20Android%20devices%20also%20allow,numbers%20that%20you%20want%20blocked.

Candidate Solutions

Download Custom Android Apps to Android Device to test on Android Auto

https://developer.android.com/training/cars/testing

Test in real vehicles

To test your app in real vehicles, it must be installed from a trusted source such as the Play Store, with one exception detailed in Allow unknown sources. You can use Internal App Sharing or an Internal Test Track to distribute your app to devices without going through the Play Store review process.

Allow unknown sources

On Android Auto, there is also a developer option to enable running apps not installed from a trusted source. This setting only applies to media and messaging apps and doesn't apply to apps built using the Android for Cars App Library.

Enable Android Auto developer mode  

In addition to the Android developer options (usable on both Android Auto and Android Automotive OS), Android Auto has its own developer mode that can be used to improve the development experience. To enable it, follow these steps:

1. Open the Android Auto settings.

   • Android 10 or higher: on the device, tap Settings > Apps & notifications > See all apps > Android Auto > Advanced > Additional settings in the app.
   • Android 9 or lower: in the Android Auto app, tap the menu, then tap Settings.

2. Scroll to the About section near the bottom and tap Version to display the version and permission information.

3. Tap the Version and permission info section 10 times.

   The Allow development settings? dialog appears.

4. Tap OK.

   Developer mode is now enabled, and you can access developer options in the overflow menu. You only need to enable developer mode once. To quit developer mode, use the option from the drop-down menu in the app bar.

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