Thank you for the links, I got it solved. Roaming isn't unusual inside of Austria when the phone company is a re-seller using another company's network. The real problem was the DNS Server that did...

Model : M7350 Hardware Version : V3 Firmware Version : 1.0.10 ISP : yesss! (A1 Austria) Hi everybody, I bought my M7350 in Germany and it's working quite well there. So I wanted to use my M7350...