Mobile Phones
The local mobile phone operators use GSM networks and have roaming agreements with most international operators.
If you have a tri-band or quad-band mobile phone, it will function in Europe. If your phone has not been locked by a particular carrier, it is possible to purchase a pre-paid SIM card to use in Germany at local rates. These are available in any mobile phone shop.
With a German SIM card, steep roaming charges apply as soon as you cross the border into another European country.