Then you should reset it.
- Head over to this page over wi-fi, and select your device (or a similar one). Then go to Internet/Manual configuration and follow the steps to add a new Access Point.
- Do you have an iPhone and do you also use the Viking App? In the app, go to More > Settings > Load APN Settings. Then, magically, the correct settings will be set in your device.
- Until you’ve reset your mobile internet, your hotspot will not work either. Obviously.