To know if you are not affected, check if your phone is listed among the phones that WhatsApp will no longer support.
Brandnewsday reports that a new WhatsApp update will restrict the popular instant messaging app from function across millions of phones from 1 January 2021.
WhatsApp Will No Longer Work On These iPhone, Samsung, Android Phones
As a corollary, many older Android and iPhone devices will be affected by this update as it will no longer be supported by the latest version of the app, it will, therefore, forced owners to either update their mobile operating system or buy a new smartphone.
iPhone(s) to be affected by WhatsApp update
Any iPhone not running iOS 9 or newer, or any phone not running at least Android 4.0.3 – also known as Ice Cream Sandwich – will no longer be able to open or operate the Facebook-owned app.
This means all iPhone models up to the iPhone 4 will be unable to support WhatsApp, as these phones are not capable of updating to iOS 9.
Also, the iPhone 4S, iPhone 5, iPhone 5S, iPhone 6 and iPhone 6S were all released before iOS 9, however, owners can still update the operating system if they are yet to do so.
Android phones to be affected by WhatsApp
Android phones that will lose WhatsApp support include the Samsung Galaxy S2, HTC Desire and LG Optimus Black.
Phone owners can see what software their device is using by checking the settings section. For iPhone users, this can be found under Settings > General > Software update.
Most of the 2 billion WhatsApp users around the world will not be hit by the change, though the small fraction that is will likely comprise several million people worldwide.
Complete List of Phones set to lose WhatsApp support on 1 January 2021:
Apple iPhone 1-4
Samsung Galaxy S2
LG Optimus Black
Motorola Droid Razr
Any Android released before 2010
Phones that will need to update to at least iOS 9 or Android OS 4.0.3 To Enable Whatsapp:
Apple iPhone 4S
Samsung Galaxy S3 and newer
Samsung Galaxy Note
Motorola Droid 4
Sony Xperia Pro and newer