$26 charge for what?

I just received a new LE910C4 modem today. I installed it in the hat and then proceeded to install a fresh copy of Raspberry Pi OS. After the OS install, I get an email that $26 of data has been charged to my SIM. I’m not sure what happened because there is also 8MB of upload in the data charge. wlan0 was setup during install, so why was wwan0 used? Can I get a refund for those charges?

To add insult to injury, wwan0 is not functional after OS install. Can’t ping:

pi@raspberrypi:~ $ ip a show wwan0
4: wwan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
    link/ether 36:d8:a1:87:b5:03 brd ff:ff:ff:ff:ff:ff
    inet brd scope global dynamic noprefixroute wwan0
       valid_lft 41945sec preferred_lft 36545sec
    inet6 fe80::74eb:ad6e:7a34:2a87/64 scope link 
       valid_lft forever preferred_lft forever
pi@raspberrypi:~ $ ping -I wwan0 google.com
PING google.com ( from wwan0: 56(84) bytes of data.
--- google.com ping statistics ---
7 packets transmitted, 0 received, 100% packet loss, time 266ms

ECM seems configure correctly:


#ECM: 0,1


+CREG: 0,5

+CGDCONT: 1,"IP","super","",0,0,0,0
+CGDCONT: 2,"IPV4V6","ims","",0,0,0,0
+CGDCONT: 3,"IPV4V6","sos","",0,0,0,1
+CGDCONT: 4,"IPV4V6","attm2mglobal","",0,0,0,0


I can’t answer the question, but I have the same problem.
With my newly installed Sixfab Raspberry Pi Cellular IoT Kit (LTE-M), it too is using up all my data.

My Raspberry Pi4 has a wired Ethernet and Wireless Ethernet attached that both have an Internet connection, but the sixfab hat is acting as the default connection if it is turned on.

To “fix” this, I “poff” the Sixfab or unplug the USB cable from it.

The support here at Sixfab is lacking, so the only way to diagnose the problems is to experiment until you find something that works.


Apologies for delaying.
Answered HERE