Those instructions work for all phones. If you followed them and your data is not working then almost certainly you did something wrong. Delete any apns that are configured and start from scratch. Make sure to follow the instructions exactly. If it still doesn't work then post your settings here for review. As I said if they don't work then you have most likely done something wrong.
Hope this helps.
I am not a 48 employee so if you need to contact 48 support then use option 3 or the chat facility here.