As the years pass by, WhatsApp makes important updates to meet their users needs. In this context, some devices are no longer compatible with the newer version of the app.
List of Android Devices:
Samsung Galaxy S2
Motorola Droid Razr
Iphone 4s
Iphone 5
LG Optimus Black
HTC Desire
List of iOS Devices:
Iphone 4s
Iphone 5
Iphone 5c
Iphone 5s
It is important to note that the instant messaging application will continue working or would be compatible with devices running on Android OS 4.0.3 or higher and with iPhone running iOS 9 or higher. If you are an Android user and want to check the version of Android, then go to “Settings” and look for “about phone” and check the Android Version.