# Cannot set USBCFG=4 with Telit and LTE-M sim card

**URL:** <https://community.sixfab.com/t/cannot-set-usbcfg-4-with-telit-and-lte-m-sim-card/1742>\
**Category:** 3G/4G&LTE Base HAT\
**Tags:** me910c1-ww, usb, telit\
**Created:** [November 21, 2021, 10:34am UTC](https://community.sixfab.com/t/cannot-set-usbcfg-4-with-telit-and-lte-m-sim-card/1742 "2021-11-21T10:34:34Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![aschoneveld](https://community.sixfab.com/user_avatar/community.sixfab.com/aschoneveld/32/916_2.png) [@aschoneveld](https://community.sixfab.com/u/aschoneveld)\
**Post date:** [November 21, 2021, 10:34am UTC](https://community.sixfab.com/t/cannot-set-usbcfg-4-with-telit-and-lte-m-sim-card/1742/1 "2021-11-21T10:34:34Z")

</div>

Although SIXFAB core shows an active cellular connection I keep getting an error message when trying to set USBCFG to mode 4:

```auto
AT

OK

AT#USBCFG?

#USBCFG: 0

OK

AT#USBCFG=4

ERROR

```

Some more commands I have tried:

```auto
AT#PORTCFG=?

#PORTCFG: Variant=0: AT= USIF0 USB0 USB1

#PORTCFG: Variant=3: AT= USIF0 USIF1 USB0

#PORTCFG: Variant=8: AT= USB0 USB1

#PORTCFG: Variant=13: AT= USIF0 USB0

OK

AT#USBCFG=?

#USBCFG: (0,3)

```

How can a troubleshoot this further?

Kind regards,  
Arjen

---

<div class="post-metadata">

**Author:** ![ensar](https://community.sixfab.com/user_avatar/community.sixfab.com/ensar/32/8_2.png) [@ensar](https://community.sixfab.com/u/ensar)\
**Post date:** [January 5, 2022, 1:36pm UTC](https://community.sixfab.com/t/cannot-set-usbcfg-4-with-telit-and-lte-m-sim-card/1742/2 "2022-01-05T13:36:59Z")

</div>

Hi @aschoneveld ,

The Telit ME910C1 module has 2 values(0 and 3). Try setting USBCFG to mode 3.

 ![Telit ME910C1 USBCFG](https://community.sixfab.com/uploads/default/original/1X/364657d6a69a1effcf400652ed0b7930f03fd99e.png)