Know which are the versions of the operating systems necessary to run WhatsApp; some iPhone models will not be supported by the app.
IPhone branded phones must have a minimum operating system of iOS 10 or they will no longer be supported by the favorite app of more than 2 billion users.
According to the official WhatsApp blog, the latest version of the application (version 2.21.50) requires iOS 10 as a minimum to work, so to use WhatsApp on your iPhone you need iOS 10 or a later version.
Among the operating systems that WhatsApp considers obsolete is iOS 9, released six years ago and no longer meets the use and security requirements that the application needs, so from iPhone 4s to 1, you will no longer be able to continue using WhatsApp because These terminals support a maximum of iOS 9.3.6, a version of the operating system lower than required.
Below we list the iPhone models that will be able to continue using the instant messaging application:
iPhone 6 Plus
iPhone 6s Plus
iPhone 7 Plus
iPhone SE (2016)
To find out which version of iOS you have, follow the following path: Settings> General> Select Information.