@MidnightDraven

There is one option "Netz" (German), which could be translated as mobile network.
In this dialog there are two entries:
The name of the provider of my SIMcard and the modus of choosing the network (automatically and manually).

There is no option to swicht out "data service".
Even a right click with the trackwheel does not offer any more options.

Is it really possible to configure a BB as "telephone only" - without any push services, without internet access?

To the icons:
I know the general option to hide icons. But the three, I mentioned, could not be disabled.