For the Sony INZONE H9 Wireless Gaming Headset, you do not necessarily need to use the included Bluetooth dongle to connect to your PC, although it is an option for a stable and low-latency connection. Here are the details:

- You can connect the INZONE H9 to your PC using the Bluetooth feature, as the headset supports Bluetooth 5.0. This allows for simultaneous connection to both your PC and your smartphone.

As for connecting to your Android phone:
- Yes, you can connect the INZONE H9 to your Android phone via Bluetooth. The headset supports dual Bluetooth connectivity, allowing you to stay connected to your phone while gaming on your PC or PlayStation 5 via the USB wireless connection.