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Learn more about your Apple iPhone 3GS
Turn Bluetooth on or off, scan and connect to other Bluetooth devices, and unpair a connected device.
Set up your device as a mobile hotspot and share your data connection with Wi-Fi-capable devices.
View signal strength, network connection status, and enable/disable mobile network and international roaming.
Learn your device's SIM card type, operating frequencies, physical characteristics, storage, and more.
Learn how to update the software for the iPhone, iPad, and Apple Watch.
Use Passbook to store coupons, boarding passes, event tickets, store cards, credit, and debit cards.
Manage email settings such as sync frequency, server settings, signature, deleting an email account, and more.
Set text (SMS) and picture (MMS) message alerts, limits, display options and more.
Look at photos, watch videos, listen to songs, and more in just a few taps.
Manage camera and video settings including flash, timer, voice control, recording mode, storage location, and more.
Take and edit a picture or video, use the front and rear camera, and switch between camera and video modes.
This article describes how to change the wallpaper, or background, of the home screens.