Zyxel LTE5398-M904 connected to the cellular network but no Internet access

I have the same suspect because I'm currently using another provider (PosteMobile), since April 6, and the problem did not happen yet. Nevertheless there is no assurance because the problem when using Iliad happened on random basis so, could be, will happen tomorrow or never, who knows. In any case the firmware should be able to manage this uncommon situation, at least now that we made aware Zyxel.

To anyone having this issue, could you please check in your log file just after the issue if you have a similar events sequence ?

MMM dd hh:mm:ss user.notice RILCMD: RILCMD STATE: RS_READY ============> RS_UPDATE
MMM dd hh:mm:ss user.notice RILCMD: cid: 1 cgact_status[0]:1
MMM dd hh:mm:ss user.notice RILCMD: Device UP in quectel_eg18_update()
MMM dd hh:mm:ss user.notice RILCMD: set_LTE_connection_status: Up
MMM dd hh:mm:ss user.notice RILCMD: RILCMD STATE: RS_UPDATE ============> RS_READY
MMM dd hh:mm:ss user.warning RILCMD: [LTE Cell info] RFCN:2900, Cell_ID:NNNNNN, PCI:52, RSRP:-80
MMM dd hh:mm:ss user.notice RILCMD: [LTE Cell info] RFCN:2900, Cell_ID:NNNNNN, PCI:52, RSRP:-80
MMM dd hh:mm:ss user.notice RILCMD: [IP info] IPv4:NNN.NNN.NNN.NNN
MMM dd hh:mm:ss user.notice RILCMD: [IP info] IPv6:

Be aware that you must have some of log options turned on to be sure to record the above events.

In addition, could you please check if the IP address reported by the log (NNN.NNN.NNN.NNN in the above example) is the same you can see in the web configurator main page ? In my case the 2 IPs do not match and the web configurator main page still shows the IP address previously assigned.

Last but not least, I'm currently using anothe Provider other then Iliad ("Free" brand in France) and the issue is not occurring since when I started using it. So seems that the problem in some way linked to Iliad infrasturcture/networking behaviour.

Thank you