Hi i've recently purchased a blackberry curve 9320, my previous phone was a blackberry cruve 8520 and i got quite used to the OS version 5, i'm not keen on the new OS version 7.1 as i don't like the drop down menu interface i just can not get used to it, my question is dose anyone no how to downgrade from OS version 7.1 to the old OS version 5, any help will be much apreciated thanks 