Hello. I've been a long-time viewer, but this is my first post. The title says it all really - I'm really hating how iOS4 has slowed down my 3GS and don't see the point of multitasking, so can I go back to OS3? I've searched the forums but every question regarding downgrading seems to refer to jailbroken phones. Mine is a straightforward, legit O2-locked iPhone. Thanks for any help.