WORKAROUND
CAUTION: This fix will erase everything in your phone memory – messages, contacts, settings. Back up your data before proceeding.
Do a software reset. From the Dialer, enter *#7370#. You can now install apps again. Crude, but it works.
WORKAROUND
dont work, also the phones back up utility is shit too and will most likely lose some info like i did
Fuck off you German freaks!