Sooo . . . Sorry to dig up a dead horse and continue to beat it. But, I wanted to add some small tidbit to the Ram/Rom discussion.
Rom: Data is persistent through power cycle. The Os/.exe's are written here and when the phone boots they are written into the ram. Kind of "like"(I say this loosely) the hard drive on you home computer.
Ram: Data is not persistent through power cycle. This is where the Os and currently running programs run. Kind of "like"(I say this loosely) the system ram on you home computer.
My sincerest apologies for the OT comment of which I'm usually most frustrated by.