Android users need an additional app. You can find more information here instruction Android (you can't download the app from the Wi-Fi "gast-ue") Apple devices doesn't need an app!
Further informations and tips for setting up the eduroam can be found at Advice and support.
Due to the deactivation of TLS 1.0/1.1 (deprecated since March 2021) only the following operating systems are capabel to connect to eduroam:
University of Erfurt (Campus) Nordhäuser Str. 63 99089 Erfurt