Ive recently purchased a Blackberry bold, and have unlocked it so i can use my O2 sim with it. It was locked to the vodafone network before. What i would like to know is if it is possible to change the OS from vodafone to the O2 version? Ive downloaded the O2 OS for the bold but dont really understand how to install it? Also is there a way to get rid of the vodafone logo evertime i turn the phone on?