WhatsApp is updated, and as it did in previous years, from 2019 it will stop working in some sort of cage, since the application will have some limitations for such equipment.
In this sense, they can not create new accounts on WhatsApp Nokia S40 starting from December 31, and on February 1, the application will no longer run on Android 2.3.7 operating system or higher; and iPhone with iOS 7 or earlier versions.
Although profiles have already been created will continue to work on these computers, it is possible that some of the new functions can no longer be used.
How to check your computer's operating system:
Android: go to "Settings", then "About phone."
iPhone: go to "Settings", then "General" and finally, the "Information".