I entered my number and then it says I have to update my version. it then goes to the app store. I press update. poppup saying to itunes TOS changed. I ok it but get only a white page. so basically stuck and cant use whatsapp I did do a long power/home button press and then tried. I also tried adding my number without the 0 (zero) as my first number but the same crap happens. the TOS list did come up once and I agreed to it but it got locked on it and didnt move on.