How to Put a Facebook Application on a Phone
How you add the Facebook app to your phone depends entirely on your phone. Most major smartphones have an application for Facebook, but they install applications slightly differently. Before tackling the installation, make sure your phone meets the minimum requirements to run a Facebook app. Even if your phone does not have an official Facebook application, you can use your phone's browser to visit the mobile edition of Facebook.
Facebook for iPhone
Open the iTunes App Store, either on your iPhone or on your computer using iTunes.
Download the free application. If you're downloading it on your iPhone, click the "Free" button, which will change to "Install." Click it again. The app will immediately be downloaded to your home menu. If you're downloading the app in iTunes, it will sync to your phone the next time you connect it to your computer.
Click the Facebook icon on your home screen and fill in your login details. Once you're logged in, you'll get alerts for your Facebook notifications, and be able to navigate and update your feed on your iPhone.
Facebook for Android
Go to the Android Market on your phone and search out the Facebook application.
Click the "Free" button to start downloading the application to your phone. You may be prompted to sign in to your Android Market account before the download begins.
Select the Facebook application from your main menu and fill in your login details to access the various sections of Facebook on your phone; you can access your news feed, view photos and even Facebook Chat.
Facebook for BlackBerry
Download the Facebook for BlackBerry app either through your browser or through your BlackBerry App World. If you're downloading via your browser, you will be asked to enter the email address associated with your BlackBerry to send the app to your phone. You can also visit "www.blackberry.com/facebook" on your phone to download the app.
Select the application on your BlackBerry and fill in your Facebook login details.
Use the application to check in, the process of letting friends know where you are, check your news feed and update your status on the go.
Open your phone's Web browser. If your phone does not offer a Facebook application or if you do not have a phone that supports applications, you can still visit Facebook Mobile using your browser.
Point your browser to either the regular mobile site at m.facebook.com or the touch-screen version of Facebook at touch.facebook.com. You can use either, depending on which interface is easier for you to use.
Navigate using your phone's arrow buttons or touch screen.