How to install Whatsapp on your phones
Whatsapp Inc. says:
WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. WhatsApp Messenger is available for iPhone, BlackBerry, Android and Nokia and yes, those phones can all message each other! Because WhatsApp Messenger uses the same internet data plan that you use for email and web browsing, there is no cost to message and stay in touch with your friends.
In addition to basic messaging iPhone, Android and BlackBerry WhatsApp Messenger users can send each other unlimited images, video and audio media messages.
Depending on your smartphone, installing Whatsapp is quite easy. According to the company, the first year license is FREE, then you have to pay USD1.99/year.
iOS (iphone and ipad)
You need to install the app using Apple iTunes on your computer and sync it with iphone. It can also be installed directly from your iphone using App Store app. You can also download it here. Of course, you need to register with Apple iTunes prior do downloading. It will cost you only USD0.99.
You can install the app using Android Market on your phone and do the search there. You can also download here and sync it with your phone later.
It can be installed using Ovi Store. Search the app when you login onto oovi store from your nokia phone. You can also download it here. You can then sync to your phone to install it.
You can install Whatsapp using your BlackBerry Internet Browsing Service (BIS) on your phone.
Once you have installed it, you can now search you friends using your phone’s contact list. You can start chatting with friend (if your friend had installed it) or you can invite them to install it.
So you can save your SMS charge since the app will use your Internet connection (Wifi or 3G), assuming that you have fixed monthly Internet/3G charge.