How do I know there is a device update available, how do I check I have the latest Software (Operating System Software)?

NOTE: When a new Firmware/Software is available, notifications are sent out to all Cat S61 devices.
On the home screen, an Icon will show in the notification panel. When the icon appears, you can drag down the notification panel and select.
To manually update:
1. Go to Settings menu.
2. Scroll to the bottom of this screen, and select “About phone”.
3. Select the “System updates” option.
4. The devices will download and install an update if there is one available and you have sufficient battery.

Update as of February 2019: The Cat S61 launched on Android Oreo and will be updating to Android Pie later this year.