: WhatsApp requires a handshake with its servers to function. Once a version is flagged as obsolete, the servers will refuse to connect, rendering the app useless regardless of installation.
These are not official and are typically distributed via third-party sites, Cydia (for jailbroken devices), or sideloading tools. whatsapp ipa for ios 712
Microsoft’s older Skype app works for text and audio calls, though video may be unstable. : WhatsApp requires a handshake with its servers to function