# Changing USB Config Type

**URL:** https://forum.sierrawireless.com/t/changing-usb-config-type/27570
**Category:** Device Management
**Created:** [August 2, 2022, 6:20pm UTC](https://forum.sierrawireless.com/t/changing-usb-config-type/27570 "2022-08-02T18:20:45Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![jack3](https://avatars.discourse-cdn.com/v4/letter/j/b2d939/32.png) [@jack3](https://forum.sierrawireless.com/u/jack3)
#### Post date: [August 2, 2022, 6:20pm UTC](https://forum.sierrawireless.com/t/changing-usb-config-type/27570/1 "2022-08-02T18:20:45Z")

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In the manual: AirPrime EM75xx/EM74x1/MC74x1 USB Driver Developer’s Guide  
there is a statement that says "Important: Do not use !USBCOMP to change the module’s configuration type (e.g. Legacy or MBIM\_USBIF). Changing the type may make the module unusable. Use !USBCOMP only to  
enable/disable specific interfaces (e.g. NMEA, Modem, etc.).  
And then goes on to show how the USBCOMP command works to change the type.  
If I want to use the MBIM\_USBIF instead of Legacy-Generic how do I change it without using USBCOMP?

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### Author: ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)
#### Post date: [August 3, 2022, 12:56am UTC](https://forum.sierrawireless.com/t/changing-usb-config-type/27570/2 "2022-08-03T00:56:48Z")

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do you mean you want to enable MBIM?  
If so, you don’t need to change the module’s configuration type (e.g. Legacy or MBIM\_USBIF)