If the volume is very low when combining a Devialet Gemini and a Android Phone, this is because of a specific setting on Android.
You will find below the steps to remove this locker.
- Go in the settings of your device on System.
- Then you will have to select “About this phone”.
- Press 7 times on “Build number”.
- You will then have the Developper Options.
- Go back into the system pages and select Advanced settings.
- Select "Developpers Options"
- Toogle the option named Bluetooth Absolut volume.
- Restart the phone.
In case this doesn't increase the volume, we suggest you to contact the manufacturer of your Phone to get more info on their settings.