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You can expand the phone functionalities by downloading and installing apps. Follow these instructions to download and use apps from App Store.
Before you can download and use an app from App Store, you need an Apple ID. If you don't have an Apple ID, you can create one at www.apple.com
Find "App Store"
Download and install app
Press the price.
Log on to App Store if you're asked to do so.
Follow the instructions on the display to download and install the app.
Follow the instructions on the display to use the app.