Now I would like to test Unicode strings with values (>256) because I want to localize my application. But like the emulator the device does not show Unicode characters that are beyond the ASCII values. For example a Greek character is not shown. Such characters are simply not shown/stripped from the strings.
I can see the (correct) Unicode string in the IDE, but neither in the emulator nor on the device.
There is no problem with unicode characters. It is possible that you are using a character that is not supported by the current typeface. Though I expect Greek characters to be supported.
Can you post your code?