Android/iOS versions
Android
- Open your phone's Settings app.
- Near the bottom, tap About phone and then Android version.
- Find your "Android version," "Android security update," and "Build number."
You can also follow this link for the full article on how to keep your device updated and secure: https://support.google.com/android/answer/7680439?hl=en
iOS
- On an iPhone, iPad, or iPod touch; go to Settings
- Then to General.
- Then tap About.
- From there, you will see your version.
Apple's full article can be found here: https://support.apple.com/en-us/HT201685