I have a s/w unlocked iPhone 3GS on 4.0.1 (05.13.04 baseband). I plan on taking it to Europe w/ me and dropping in a prepaid sim when I get there -- probably T-Mobile (Germany) or Vodaphone (Germany). Will it be plug and play or will I have to plug the phone into iTunes? I planned on taking just my iPad so hopping iTunes activation isn't needed.