Zyxel LTE7490-M904 : any feedback?

Hardware Questions and Recommendations
4

I assume the same procedure (note I have not tried it) that you see here (I'm happy with Openwrt and would never go back to OEM firmware):

none in particular I prefer the command line to see the various parameters of the LTE line example:

cat /root/cell_band

#!/bin/sh

LTEPROTO=$(cat /etc/config/network | grep "proto 'modemmanager'" | wc -l)
if [ ${LTEPROTO} -eq "0" ]; then
file1=$(mktemp)

ping -W 2 -c 1 9.9.9.9 > /dev/null 2>&1
picocom -t "$(echo -ne 'AT+QCAINFO\r\n')" /dev/ttyUSB2 --nolock --exit-after 300 --quiet --logfile $file1 >/dev/null
cat $file1
rm $file1
else
echo "Script not compatible with \"ModemManager\""
exit 1
fi

output

AT+QCAINFO
+QCAINFO: "pcc",100,100,"LTE BAND 1",1,65,-113,-8,-81,12
+QCAINFO: "scc",1500,50,"LTE BAND 3",1,65,-107,-11,-84,0
DL
+QCAINFO: "scc",1650,100,"LTE BAND 3",1,65,-103,-14,-80,0
DL

OK

or uqmi commands

uqmi -d /dev/cdc-wdm0 --get-signal-info; # modem into QMI
uqmi -m -d /dev/cdc-wdm0 --get-signal-info; # modem into MBIM

output

{
        "type": "lte",
        "rssi": -85,
        "rsrq": -12,
        "rsrp": -113,
        "snr": 6.000000
}

ps: I assume that since the unit is positioned outside the house you will have a better signal in terms of SINR and RSPQ but it is only a hypothesis that can vary based on how far you are from the tower that emits the signal and any obstacles that are there

ps: since your router does not have a USB port that can accommodate a USB stick, if I were you this would be the list of packages to install (in addition to those already present):

at htop wget-ssl sed curl diffutils lsof usbutils procps-ng-watch coreutils-base64 flock lslocks picocom sms-tool qmi-utils luci-proto-qmi kmod-usb-net-cdc-mbim umbim luci-proto-mbim owut tcpdump openssh-client openssh-client-utils openssh-keygen
luci luci-ssl luci-app-uhttpd luci-app-firewall luci-app-https-dns-proxy pingcheck
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