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WhatsApp, the world's most popular messaging app, will be updating its system, causing old phone models to lose compatibility to use it.
By the end of 2016, the Facebook-owned company would have ceased the ability of many phones to use the app.
According to The Lad Bible, the following are the list of incompatible phones:
Apple: 3GS/ iOS6
Android: Android 2.1 and Android 2,2
Windows: Windows Phone 7
"While these mobile devices have been an important part of our story, they don't offer the kind of capabilities we need to expand our app's features in the future," a spokesperson said.