Samsung Galaxy S4 User Manual page 322

Displays when the Software update feature is in
progress.
To update your device:
1. From the Home screen, press
Settings
Software update.
2. Read the Software update information screen.
3. Select an available option:
Note: You configure the device's software update parameters.
• Cancel: Tap this option to cancel the operation.
• Wi-Fi settings: Enable this option to only download available
updates via an active Wi-Fi connection. If disabled, the device
will begin available downloads via its' T-Mobile connection.
• OK: Tap this option to connect to the remote server, detect if
there is an available update, the begin the download over your
existing data connection.
–
Software updates can include bug fixes, enhancements to
services, to the device or currently installed software.
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and then tap
(More tab) About device