I recently switched to 1&1 here in DE. They offer 1.5gb for 17eur with unlimited calls (without contract). You can get better/cheaper plans with a tarif though

I recently switched to 1&1 here in DE. They offer 1.5gb for 17eur with unlimited calls (without contract). You can get better/cheaper plans with a tarif though https://mobile.1und1.de/ https://mobile.1und1.de/