When connecting my mobile phone to BT11, will the Bluetooth on my cell phone work still?

The BT11 uses the USB port of the mobile phone, which does not affect the Bluetooth function of the mobile phone.

However, due to the different settings of different mobile phone systems, the USB port and Bluetooth may not be able to output audio at the same time.

If you want to use the BT11's Bluetooth function, you can plug it in and use it directly without setting; if you don't want to use the BT11 but use your cell phone's Bluetooth function, just just unplug the BT11 from the mobile phone.