Mellow providers with good tariff for occasional users

Upon reflection, I have decided for DeutschlandSIM, although here the costs are not covered on the number portability, as it is with most other suppliers for new customers default.
The favorable tariff this makes up for it but after a few months and the students you had to offer one-time only 2.95 EUR instead of pay in my opinion too expensive 19.95 EUR.

The entire process incl. Number Portability ran flawlessly.
Somewhat confusingly, the info was in an email that the PIN and PUK will be sent by mail, but then must be retrieved in the service world. In another e-mail, however, it is said that the world service is available only from the porting date. That's something contradictory.

Apart from DeutschlandSIM is very customer-friendly. All actions are confirmed directly by e-mail. The shipping from Amazon worked perfectly.