Operating systems such as Android, Windows often release updates to their software to address bugs or security loopholes in their software. Hackers and malware often target devices running on outdated software. Hence it is extremely important for you to keep your phone updated.
Open the INFOSECYOUR Mobile Security and Online privacy Android app on your Mobile phone and click Device scan icon on home screen. Scroll to Android Systems updates section to check if your mobile phone is running on outdated version of android.
You will also receive notifications from device scan if your phone is not updated
Settings may vary based on your manufacturer
Note: Android handset manufacturers release software updates or Android updates at different times for each of their models. Hence all Android users may not be on the same version of OS