The steps in the above image with some useful links
First connect to the Internet by signing into The Cloud or using your own mobile data, then go to https://register.it.ox.ac.uk/ to register for a Remote Access Account.
PLEASE NOTE: If you have an Android device install the eduroamCAT tool from the ‘Google Plan Store’ before continuing.
On the device you want to connect go to https://cat.eduroam.org/ click on the ‘download eduroam installer’ button and select ‘University of Oxford’ as your institution.
When prompted for a username and password, enter your username followed by @OX.AC.UK e.g. abcd1234@OX.AC.UK. Remember, the password for eduroam is the Remote Access password.
You should now be able to connect to the eduroam network.
PLEASE NOTE: that this will work only after the time mentioned on the registration page