I've only just got around to updating my iPhone 4 to ios 5. Thing is, I rely on whatsapp msgr as my boyf lives abroad and has a blackberry. It's wiped all apps and music off my phone but my contacts, texts and photos are still there. Upon trying to download whatsapp, the app store can't find it when I search for it at all. What's going on?! I know lots of people who have the 4s and I'm sure they have whatsapp so it can't be that it's not compatible with ios 5 surely? What should I do???