We don't specifically support these services on a mobile connection due to the nature of the signal. Maybe the coverage is not adequate enough but I don't have a specific reason I can offer you as a solution.   

Well it works fine with lebara somehow and Ive just changed because they dont have unlimited internet, I think there is a way to fix it. Because I find it hard to believe that suddenly yours doesnt work well when lebara signal comes out of the same transmitters. And the blockage of riot servers is still your choice.

Which apn are you using? Try to use apn portalmmm.nl instead of apn internet.