After a factory reset the Deco can now send SMS. Thank you very much for all your work on this case. BR Andreas

@David-TP Hello David, thank you for your answer. I just sent the data (Web UI system log and screenshot) to the given email adress. BR Andreas

I'm using the Deco X50-5G with a SIM from O2 5G-plan "unlimited on-demand" with a data plan of 10 GB each day wich can be topped up in 2 GB steps by SMS, when the 10GB are used. Until end of november...