Meanwhile ordered for the 3rd time ..... For my wife, my brother and my sister in law. .. Every time without any problems! While activation lasted 2Werktage once, but since I had not ordered at the last minute, that was ok.
Supplement: (18:04:13)
Even my son may appreciate a card from O2 DeutschlandSIM since yesterday. As in the other cases: no problems unlocked immediately and works.