We recommend
€8 to 16/mo
prepaid bundles
Best for: Getting a working number on day one with zero paperwork.
Network
O2
Contract
Prepaid, no tie-in
Setup
In-store + app ID check
Data
Up to ~25 GB
EU roaming
Included
✓No Anmeldung or bank account needed
✓Buy with cash at any Aldi
✓Easy monthly bundles
×O2 coverage is weakest of the three networks
×App is German-first
From the SIM cards & mobile plans comparison in Berlin. Prices checked June 2026.