Very bad service. I have been using different operators in my life in different countries. But O2…read moreare the worst. It is just with O2 that you can have some weird bills for something that you didn't subscribe to and never used. And they will tell you that they cannot do anything, you should complain and wait. I have the bad experience of a fake ABO: Wap-Abo: Quiz/net mobile AG I have heard a lot of other bad experiences from my colleagues.