NOTE: When a new Firmware/Software is available, notifications are sent out to all CAT S31 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. Select the “Yes” option
5. The device will check the battery charge level and may ask you to further charge
Update as of February 2019: The Cat S31 launched on Android Nougat, and will be updating to Android Oreo later this year.