# Network not getting registered

**URL:** <https://forum.sierrawireless.com/t/network-not-getting-registered/25069>\
**Category:** MC/EM Series\
**Created:** [September 30, 2021, 8:18am UTC](https://forum.sierrawireless.com/t/network-not-getting-registered/25069 "2021-09-30T08:18:39Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**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:** [September 30, 2021, 8:57am UTC](https://forum.sierrawireless.com/t/network-not-getting-registered/25069/4 "2021-09-30T08:57:31Z")

</div>

you need to connect antenna

you might also take a look at this document for establishing data connection in linux:

> [@Example on establishing data connection by AT!SCACT via MBPL R20 driver](https://forum.sierrawireless.com/t/example-on-establishing-data-connection-by-at-scact-via-mbpl-r20-driver/24130):
>
> Here is an example to establish data connection by AT!SCACT via MBPL R20 driver: Module: WP7609 FW: R13 MBPL: R20 PC Environment: Ubuntu 18 need to install the MBPL R20 driver for qmi\_wwan and qcserial (MBPL\_Drivers\_USB\_R20\_ENG1-src.tar.gz) avoid the Ubuntu changing the network name: ln -s /dev/null /etc/systemd/network/99-default.link sudo apt-get install libqmi-utils sudo apt-get install udhcpc now insert the USB to PC sudo chmod 777 /sys/class/net/wwan0/qmi/raw\_ip …

---

_[View the full topic](https://forum.sierrawireless.com/t/network-not-getting-registered/25069)._