Now that the German Telekom is not the exclusive iPhone carrier in Germany anymore, Apple has started selling unlocked iPhone 4 and iPhone 3GS phones. In the UK Apple Store customers already had this option.
An unlocked 16GB iPhone 4 sells for 629 Euro (~$870), which is actually about $100 more than Apple charges for it in the UK. With an unlocked iPhone 4, Germans can now choose their carrier freely. Aside from T-Mobile, O2 and Vodafone also offer the iPhone 4 with contract in Germany.
The 16GB iPhone 4 is actually more expensive than a 16GB iPad Wi-Fi+3G. This seems strange, but Apple unveiled that they are selling the iPad at a lower margin.