RoamTheWorldCellPhones.com

Cellphone GSM Frequencies: 900/1800

(This means you will need a GSM cellphone that will work on 900MHz or 1800Mhz to use it in Germany.)

Cellular carriers for Germany

E-Plus Mobilfunk GmbH & Co. KG

Frequency: GSM 1800
Website: www.eplus.de

Coverage Map

T-Mobile Deutschland GmbH

Frequency: GSM 900/1800
Website: www.t-mobile.de

Coverage Map (NONE)

Telefonica o2 Germany GmbH & Co.OHG (O2 (Germany) GmbH & Co. OHG)

Frequency: GSM 1800
Website: www.de.o2.com

Coverage Map

Vodafone D2 GmbH

Frequency: GSM 900/1800
Website: www.vodafone.de

Coverage Map

If you've used either of these networks or roamed in Germany, please post about your experience and the cost. Feel free to ask questions.