WhatsApp version 2.19.110 (build date: March 2020).
Follow these instructions precisely:
Official support for WhatsApp on ended on March 18, 2021 . As of April 2026 , WhatsApp requires at least iOS 15.1 or newer to function. Because the servers strictly enforce these version requirements, simply downloading an "old version" of the app will not allow you to connect to the service on a device limited to iOS 9.3.6, such as the iPhone 4s. Why Old Versions Won't Work whatsapp old version for ios 9.3.6 download
While official support has ended, the community uses these workarounds to bypass restrictions: WhatsApp version 2
The question is:
Here’s why: