Metadefender - Mobile Security is able to detect the latest available version of Android that has been released by Google, but it is unable to determine when your phone's manufacturer or service carrier has made it available specifically for your device.
Most carriers take the official version released by Google and adapt it to their specific requirements, customizing the interface, adding special features and exclusive applications. This process can take many months. At some point carriers stop making these upgrades available to older devices entirely.
Because this process is handled differently by every carrier, for each of their devices, it is impossible for Metadefender - Mobile Security to discover and maintain this information.
This article was last updated on 2015-08-02
(This article was changed to reflect the new name of Metadefender - Mobile Security on 2016-02-24)