O2 is the best SIM card provider in Germany. It gives you the freedom to have full control over the cost and also offer you attractive tariffs. Just order your free prepaid SIM card and add the tariff option as per your requirements. And later, if you want to change your tariff, O2 gives you the flexibility to change it easily.

• The basic tariff includes a small data volume. Calling and texting costs you 9 cents per minute/SMS.
• You will get 1.5GB, 3GB, and 5GB data in Prepaid S, M, and L plans that are available at €9.99, €14.99, and €24.99
• EU roaming is also included in all the plans.