In Android 9.0 Pie there are several new functions and optical changes, which you may not know so far.
These include a relatively large blue circle in the status bar.
If you don't know this one yet, we would like to tell you what it means here. A large blue circle in Android 9.0 Pie indicates that Bluetooth or Wi-Fi or another data transfer method is active.
This may take some getting used to, but should give you a quicker overview of activated connections over time.
Now you know what the blue circle in Android 9.0 Pie stands for and what it means.