As we all know that whatsapp 2.8.7 which is the latest version had stoped working on ios 4.1, and it was a bad news for ios 4.1 user inculding me , but after long long searches finaly i got whatsapp 2.8.7 which works chram on ios 4.1
so i will love to share with u all.
Download itclike me
Note: This app is used by me on iphone 3gs ios4.1