Sadly Whatsapp cannot work on any iOS version below 4.3, I know it's depressing
, but there is no other way.... I contacted Whatsapp support over 9,000 times, and it wasn't much of a "support". So I guess we have to give up on Whatsapp, it's a lost cause. Anyways why don't you use Viber? I mean it's not bad, and it's still used by a lot of people. Anyways if you feel like trying anything go ahead and get Bootlace (Android on iPhone), and then install the .apk of Whatsapp, I haven't tried that yet, but I think it might work. Good luck.
