For years I was always a contract customer. And how many times I have pity ridiculed the prepaid people, which always at the wrong moment ran out of credit. And that was also the reason why Simyo came to me a few years ago the only prepaid providers question: You can set an automatic credit increase! Whenever the balance falls below 5, which automatically grabs for what. So never standing around with no money, but also the simple tariff structure prepaid. Meanwhile zubuchbare Internet volumes are yet to come, etc., also very convenient. One star deduction there that sometimes in very rural areas has reception problems. For agglomerations Simyo is but a very comfortable service provider, if you want the benefits of contracts without the long maturities.