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Qualcomm HS-USB Android DIAG 9021
 
Regarding this device, 3 hardware ID information has been found:

USB\VID_05C6&PID_9021&MI_00
USB\VID_18D1&PID_9021&MI_00
USB\VID_2949&PID_9021&MI_00

In general, when searching for drivers, most people use the device name to find the corresponding drivers, and in most cases, the correct drivers can be found.
However, it is also possible to find incorrect drivers or drivers that cannot be installed. How can you find the right driver? That's where you use the hardware ID to search for drivers.
The hardware ID is crucial information. The system uses the hardware ID information to select the corresponding drivers. Without hardware ID information, it is impossible to install drivers for the device.
Therefore, when downloading drivers, first check the hardware ID information of the device and then select the corresponding driver at the bottom of the page.
USB\VID_05C6&PID_9021&MI_00
#1 Support OS:
Size: 450 KB
Date/Ver: 08/02/2017 [2.1.2.7]
Windows XP (64 bit)
#2 Support OS:
Size: 549 KB
Date/Ver: 11/20/2019 [2.1.3.8]
Windows 7 (64 bit)
Windows Server 2008 R2 (64 bit)
Windows 10 (64 bit)
Windows 11 (64 bit)
Windows Server 2016 (64 bit)
Windows Server 2019 (64 bit)
Windows Server 2022 (64 bit)
Windows 8 (64 bit)
Windows Server 2012 (64 bit)
Windows 8.1 (64 bit)
Windows Server 2012 R2 (64 bit)
#3 Support OS:
Size: 435 KB
Date/Ver: 07/08/2015 [2.1.2.0]
Windows XP (64 bit)
#4 Support OS:
Size: 377 KB
Date/Ver: 08/31/2015 [2.1.2.0]
Windows XP (64 bit)
Windows XP (32 bit)
#5 Support OS:
Size: 416 KB
Date/Ver: 03/25/2016 [2.1.2.2]
Windows XP (64 bit)
USB\VID_18D1&PID_9021&MI_00
#6 Support OS:
Size: 569 KB
Date/Ver: 01/04/2013 [2.1.0.5]
Windows XP (64 bit)
#7 Support OS:
Size: 509 KB
Date/Ver: 01/04/2013 [2.1.0.5]
Windows XP (32 bit)
#8 Support OS:
Size: 549 KB
Date/Ver: 01/04/2013 [2.1.0.5]
Windows XP (64 bit)
#9 Support OS:
Size: 549 KB
Date/Ver: 01/04/2013 [2.1.0.5]
Windows XP (64 bit)
#10 Support OS:
Size: 549 KB
Date/Ver: 01/04/2013 [2.1.0.5]
Windows XP (64 bit)
USB\VID_2949&PID_9021&MI_00
#11 Support OS:
Size: 530 KB
Date/Ver: 10/26/2012 [2.1.0.3]
Windows XP (64 bit)
Windows XP (32 bit)
Windows XP (64 bit)
Driver Files
File Path: \
qcser.cat
qcser.inf
File Path: \serial\amd64\
qcCoInstaller.dll
qcusbser.sys
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