impossible to connect in bluetooth on a Rapberry 4

I have 2 balenasound
I try to connect with an Android 10 smartphone

1 on Raspberry Pi 2 / balenaOS 2.48.0+rev1 on which I can connect in bluetooth without problem

1 on Raspberry Pi 4 / balenaOS 2.82.10+rev1 on which the bluetooth connection is systematically refused.

how to do ?
(I bought especially the rasp4 for that, I am very disappointed)


Hello, you might be hitting this issue: “Device tree overlays not working in >= 2.82.10+rev1 for aarch64 device types” please try an earlier or later version of the OS than 2.82 and let us know if that solves the problem you’re experiencing.

OK, it works now
thank you