Millions of WhatsApp users in the world will soon not be able to access the services as the tech company phases out support for older phones.
The company is ending support for iOS version 7 meaning users with iPhone 4 worldwide will be locked out.
Though the company had explained previously that it would continue to support iOS 7 until 2020, a new version of the app will only work on iOS 8 devices only.
Despite the latest developments, the new changes wonâ€™t affect people who already have WhatsApp already installed until 2020 that was set as cut-off date.
However those who factory reset their phones wonâ€™t be able to reinstall the application.
Users of old versions of WhatsApp will not get new features added to the application and also run the risk of some features not working.
Users of iPhone 4S, 5, 5C or 5S will be affected too if they'd never updated their phone to a later version of iOS.
Apple's iPhone 4 came out in 2010 and Apple stopped selling the device in 2013. The last version of iOS it is able to run is 7.1.2.
Later phones, like the iPhone 4S and 5, can run more recent versions of iOS and shouldn't be affected.
WhatsApp routinely ends support for devices, back in 2016 the company announced that older Blackberry phones and handsets running Nokia's S60 operating system wouldn't be supported from 2017.