A new firmware version has been released for the Boombox 2 (Version 0.4.4.0), below is a list of improvements:
1. Improvements to Bluetooth connection stability.
2. Support for PartyBoost under aux-in connection.
3. Improvements for switching between PartyBoost and Stereo mode.
4. Improvements to firmware update stability with iOS.
5. Improvements to the stability of switching music between aux-in and Bluetooth connection.

The firmware update is installed as an OTA update:
1. Download and install the JBL Portable app from the Google Play/App Store, or simply update the app if you have already downloaded it.
2. Connect your Boombox 2 to your phone/tablet through Bluetooth.
3. Open the JBL Portable app and wait for the Boombox 2 to appear.
4. On the Boombox 2 screen, select settings (gear cog symbol).
5. Proceed with installing the firmware update.