eSIM instead of a German SIM
To activate a prepaid SIM in Germany, you need to verify your identity — via video call or in-store. Tourist eSIM does not require this: the package is purchased online, installed via QR, and starts working after connecting to the German network.
Data volume for business trips and vacations
For a city trip with maps, transport, and messengers, 3-5 GB is usually enough for a week. If you work from a laptop or travel a lot on trains where Wi-Fi is unstable, it's better to take 10 GB or more.
Coverage
In major cities and along main highways, 4G/5G works. In trains, rural areas, and tunnels, the connection may drop — this is a feature of German networks in general, not eSIM. The operator list is provided with each package.