It's a popular messaging app for millions of people around the world, but WhatsApp has revealed that it will stop working on several popular smartphones next week.
From February 1, users on several iPhones and Android smartphones will no longer be able to create new accounts or reverify existing accounts.
Smartphones affected include those running on Android versions 2.3.7 and older, and iPhones on iOS 8 or older, Mirror reports.
Thankfully, most smartphones are compatible with more up-to-date operating systems, so you should be able to update your device ahead of February 1.
For example, iOS 9 is available for iPhones going back as far as the iPhone 4s.
To find out which operating system your iPhone uses, go to Settings, then General, then Software Update - your current version will be displayed there.
Meanwhile, on Android, you can find out your operating system, by going to Settings, then About Phone, then Software Info.
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The news comes just days after WhatsApp stopped support for Windows smartphones.
A spokesperson for WhatsApp said: “You'll no longer be able to use all Windows Phone operating systems after December 31, 2019, and WhatsApp might not be available in the Microsoft Store after July 1, 2019.”