How do I find out which Android version I have?

To the information entry for the question form

To find out which Android version is available on your smartphone, you need to do the following:

  1. Open the "Settings" app on your device.
  2. At the bottom, tap on System und dann About the phoneScroll
  3. down to "Android version" and "Security update status".

You will then find the version number of your Android smartphone there.