I was under the tariff DeutschlandSIM Flats ordered here a few weeks ago. After my old contract was to expire just before, I have Sunday afternoon the Sim card enabled as described in the attached flyer. After the first confirmation mail by Etelon / DeutschlandSIM my card on the following Monday morning was just ready to go. Calls and surfing works with me in good quality on the Vodafone network. Likewise, a service request for a possibly later change in the tariff FlatM was answered quickly and competently. Who wants to know whether this will work: Yes it is, but costs change fee of 19.95! (Number can be maintained, that was not possible last year.) So overall been positive experiences with a small minus for the relatively high fees for a tariff change. Since I have this but not in the near term before, still 5 stars for the Due otherwise very favorable terms.