Simple question, please simple answer regarding A920
 

I have motorola a920 from austrian DREI (3) network.
It is unlocked for calls, messages, surfing etc... but I cant install no applications.... Legija told me that I need "unbranded" firmware.
The question is:

Is there a unbranded firmware for a920 and where can I download it, or does anyone know solution to my problem.
Or if someone can please send it do me on my email peshta(at)peshta.com

Thanks all