How can i download whatsapp on a friends phone

Whatsapp cannot be downloaded to install on a PC computer. You can only use it on a mobile phone device like iPhone, an Android phone or a Windows phone.

WhatsApp Home

Whatsapp is a mobile messaging service, download for your phone either from Appstore or google play store. Not for a computer without a sim card as you need a valid number

Emmaneul
I've been using the App for years. Its great!
But it only works between people using WhatsApp.
WhatsApp to WhatsApp.
It usually looks in your Contacts and checks to see if any of these numbers are using WhatsApp. Then it lets you know and the other person know that whats App can be used. The other person can disable their communication with you if they wish.
The Settings lets you "Tell a Friend" by Email that you are using WhatsApp. They have to have the App on their smartphone to make the connection
....Cheers

Do not use your phone after losing data. Any new data written into your phone might overwrite your lost Whatsapp messages.
With the real time messaging, media sharing, and group chatting, WhatsApp is currently one of the most popular messenger apps in the world.More than 400 million users have WhatsApp installed on their phones to catch up with families and friends.
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Sorry friend:) whatsapp does not support java based phones. you might need to upgrade to an Android/IOS/Windows device

Well, that's your friend's problem.

I need to download whatsapp on my samsung star gt-5233a in order to communicate with my family and friends

whatsapp and skype are blocked in egypt for andriod
to download it just copy them from any of your friend that have android phone and have the whatsapp working on it by file manager thats the only way to install the whatsapp till now