Short answer: A Germany eSIM with prepaid data in EUR is the simplest option for tourists and business travellers — activate before landing in Berlin or Munich and skip roaming surprises.
Data recommendations
5 GB for a city break; 10–20 GB for a week with navigation, DB Navigator and video calls. Multi-country trip? See best eSIM for Europe.
Germany eSIM vs roaming
Non-EU visitors often pay high daily roaming. Even EU residents may prefer a fixed travel eSIM for predictable costs.