No FaceTime no iMessage activation button

Question

I recently bought my iphone4s in japan( I live here in Tokyo ) but there is not FaceTime and no way to activate it. I already look everywhere in the settings in my phone but there is no button for it. I have an iPad2 as well and it perfectly works on it.....
Also the iMessage is not working on my phone, again there no button for the activation. Somebody any idea?.... Maybe I'm missing something

Answer 1

Since I also struggled and tried everything suggested except wiping my phone - I wanted to post that wiping my phone was the only thing that worked.
I suspect this happened because I went from a non-facetime phone to a facetime phone and upon initial setup I set the phone up as a restore from my previous iphone.  I think the server was confused about my account and it all go stuck.  I say this because this is what worked (as others suggested)
- backup my iphone to iTunes
- erase all content under setting>general>reset  (I did this while not connected to the computer just in case)
- going through prompts of setup configuration is selected SETUP AS NEW PHONE.  I connected to wifi and eventually entered my appleID when prompted.  For the facetime and iMessage prompts during setup I selected only my phone# (wouldn't think that would matter) Once all this was complete I went into settings>facetime and after a few seconds it was connected - same for iMessage.
- I then REPEATED the steps starting with 'erase all content' and setup the phone as a restore from my itunes backup (I'm sure icloud backup would work as well).  I think that now that the apple server recognized my appleID as a valid facetime ID it all worked well because after the restore I went into facetime and iMessage and after a few seconds it was connected fine.
Good luck everyone!