Talk:Germany/@comment-2601:152:4602:3A1D:BD97:2CE5:1B55:3869-20180824191119/@comment-24682153-20180825001812

The registration requirements only apply to locally issued SIM cards in Germany. Not to any other cards from outside of Germany roaming in German networks.

About half of European nations have mandatory registration now. Normally, it's not a problem. But the German onlineID system can be confusing and going to a cell phone store not always works out, but Americas are quite safe when showing their passports.

Of course, you can use any roaming SIM card in Germany too or any SIM card from the EU which is now governed by "Roam like at home" meaning in most places the domestic price is applied to roaming use in Germany.