The credentials for are usually the same as your home internet login, whereas business or city WiFi may require different access methods.
For 90% of Proximus mobile postpaid customers, you do not need to type a username or password at all. Proximus pioneered authentication on Belgian public hotspots. proximus public wifi username and password
Ensure you are using the Public Wi-Fi username found in MyProximus, not your MyProximus login email. The credentials for are usually the same as