Samsung Galaxy S6 User Manual page 62

Update Your Phone's Software
Once you have backed up all your data, use the Update now option to update your phone's software.
1. From home, tap Apps
2. Tap Update now.
 Your phone automatically downloads and installs any available updates. You may be
required to power your phone off and back on to complete the software upgrade.
– or –
1. Locate the System Update Available icon
2. Drag the Status bar down.
Basic Operations
> Settings > System Update
in notifications.
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