openstick.de

Posted: **Tue Feb 17, 2026 7:19 pm**

LTE Setup & APN Configuration Guide

Getting LTE mobile data working is one of the most common tasks after flashing. This guide covers everything you need.

Install ModemManager

Code: Select all

sudo apt install modemmanager

Check if Modem is Detected

Code: Select all

mmcli -L

You should see something like:

Code: Select all

/org/freedesktop/ModemManager1/Modem/0 [Qualcomm] MSM8916

Get modem details:

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mmcli -m 0

SIM PIN Unlock
If your SIM has a PIN:

Code: Select all

mmcli -i 0 --pin=1234

Connect to LTE

Code: Select all

mmcli -m 0 --simple-connect="apn=YOUR_APN"

Common APN Settings:

Generic/most carriers: internet
Vodafone DE: web.vodafone.de
Telekom DE: internet.telekom
o2 DE: internet
T-Mobile US: fast.t-mobile.com
AT&T US: broadband
KPN NL: internet
Vodafone NL: live.vodafone.com

Troubleshooting

Modem not found (

Code: Select all

mmcli -L

returns nothing):

Check if modem device exists:
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```
ls /dev/wwan*
```
Check if firmware partition is intact
Restart ModemManager:
Code: Select all
```
sudo systemctl restart ModemManager
```

Registered but no data:

Verify APN is correct for your carrier
Check bearer:
Code: Select all
```
mmcli -b 0
```
Try manual bearer with qmicli

No signal:

Check signal quality:
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```
mmcli -m 0 --signal-get
```
Make sure antenna is connected (internal antenna on the PCB)
Try a different SIM card to rule out carrier issues

DNS not working:

Code: Select all

echo "nameserver 8.8.8.8" | sudo tee /etc/resolv.conf