Screenshot explains all. Why modem info is needed at user icon changing. Reproducible: Always Steps to Reproduce: 1. go to kcm_useraccount 2. click on user icon 3. Actual Results: info about my 3G modem Expected Results: no info about my 3G modem I use wvdial to connect to my 3G network.
Created attachment 92994 [details] Dialog for changing user icon with my modem informations
Starting with Plasma 5.4 kcm_useraccount has been deprecated in favor of user-manager (you can run with kcmshell5 user_manager). This means that unfortunately we did not get to fix your bug, sorry about that. We encourage you to try user-manager and report any bug or improvement you may find. Sorry again for not fixing your bug and thanks for caring about KDE :)