If you got the new Android 9.0 Pie as an update on your Android smartphone or if you purchased a smartphone with this operating system, you might want to unlock the developer options.
These are not visible ex works or after an update. Therefore you have to activate them so that they are visible in the settings of Android 9.0 Pie.
To enable the developer options in Android 9.0 Pie, proceed as follows:
Enable developer mode for Android 9.0 Pie
1. Open the App menu and there the system settings of Android 9.0 Pie
2. Scroll down to "Phone info" or "Device information" depending on your smartphone.
3. select now "Software" or "Software Information
Here you will see the menu item "Build number" - tap it several times in quick succession to activate the developer options under Android 9.0 Pie.
An info appears at the bottom of the display that the developer mode is now available in Android.
You have successfully unlocked the developer options in Android 9.0 Pie and can use functions like USB debugging.