Use your Uni login credentials (full email address & password) to connect to WEBEX Meetings.
You can download the App for your device from:

The WEBEX Interface looks similar on all devices once you are in a meeting.

If you do not have a good internet connection or are using a computer without a microphone, you can connect to a WEBEX meeting via phone. This will enable you to participate in the conversations. Many WEBEX meetings are recorded, so you may be able to get a copy of the recording if the visual part contained something important for you to see. Contact the meeting organiser in advance if you are not sure whether audio-only is suitable for the meeting you have been invited to.