Hello, The Broadcom BCM2045 chipset seems to be also one of those chipsets which report the SCO maximum packet incorrectly. The attached patch works around this problem. With this workaround, a bluetooth USB dongle with this chipset is able to send SCO data correctly. The fix was verified using this USB dongle (MSI StarKey 2.0 (Ver 222-BW)) Bus 002 Device 004: ID 0a5c:2101 Broadcom Corp. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 224 Wireless bDeviceSubClass 1 Radio Frequency bDeviceProtocol 1 Bluetooth bMaxPacketSize0 64 idVendor 0x0a5c Broadcom Corp. idProduct 0x2101 bcdDevice 0.00 iManufacturer 1 Broadcom Corp iProduct 2 BCM92045DG Non-UHE iSerial 0 bNumConfigurations 1 and a Plantronics Explorer 320: Device Name: 320 Plantronics LMP Version: 1.2 (0x2) LMP Subversion: 0x8d1 Manufacturer: Cambridge Silicon Radio (10) Features: 0xbc 0xe8 0x01 0x00 0x08 0x08 0x00 0x00