I upgraded to 4.5 already, everything is great, I just told my friend to do it but he has this question that I was unable to answer, and could not find through search (I tried!!).
It's an easy question for you experienced guys though.
He's on Rogers, and he's wondering if it will erase one of his themes... quote:
"does it change any Themes? I've got a special theme on my 8320 from T-mobile that isn't offered on the Rogers devices that I would be really pissed about if it was lost (over-written). Ya think there's a chance of loosing it if updated?"