Facebook is a a popular social networking website that was originally launched in 2004. As of 2010, Facebook had over 500 million active users and, according to Compete.com, is the most used social network worldwide. The iPhone offers a free Facebook application from Apple's App Store. The application allows you to quickly upload mobile photos from your iPhone to your Facebook page.
Press the "Camera" icon on your iPhone, then press the camera button to take a digital photo from your iPhone.
Press the round button located at the bottom of your iPhone's screen, then press the "Facebook" icon. Log on to your Facebook account by entering your username and password.
Press the camera icon located at the top of the Facebook application, to the left of the status input field. Select the option "Choose From Library." Select "Camera Roll," then select the photo you would like to post to your Facebook page. Press the blue "Upload" button to post the picture to your Facebook page.