my question is: i currently have a 2G iphone (firmware 1.4) and i'm using t-mobile as my carrier, so my phone is already unlocked and jailbroken.

1.If i upgrade to firmware 2.0.2 am i gonna loose any of my files or settings i currently have, in other words (music, pictures and most important the ability to get on youtube)?

2. Since my phone is already unlocked, jailbroken and activated on (1.4) do i only have to jailbreak to get (2.0.2)? or unlock and activate as well?