The firmware update to 7.2.6 worked fine.
After this I tried to made an update for the modem as explained within the other case.
I first tried to made this update with an alternate WAN-Connection (iPhone as hotspot).
This results with the following:
"opkg update" returns:
* opkg_download: Failed to download https://downloads.openwrt.org/releases/21.02.0/packages/arm_cortex-a7_neon-vfpv4/vuci/Packages.gz, wget returned 8.
"modem_updater -g" returns:
umount: can't unmount /tmp/fwlist/: Invalid argument
The list of available versions remains empty.
The second try was to made the update offline.
I copied all the files of the update.zip from your website
unzipped all files and copied them via scp to the RUTX' /tmp/ directory
"modem_updater -i 3-1 -p /tmp/Update/" worked after that.
I'll try and check out the mobile connections and will report to you.
so please stand by
Thanks for your support.