> However, if you do that, good luck ever getting a mortgage, credit card or other post-paid services ever again if all credit report requests come back with the reponse "no data available". So I wouldn't recommend that.

How does that work for people who never had a Schufa history? If for instance I decided to move today from Brazil to Germany, would I be unable to do all these things there, since they would have "no data available" on me?