In a recent update, WhatsApp announced a list of Operating Systems and Smartphones it will no longer support from November 1st 2021. WhatsApp will no longer support systems running on Android 4.1, Apple iOS 10 and KaiOS 2.5.1, revealed in its FAQ section.
Apple iPhone SE (first generation), iPhone 6s and iPhone 6s Plus, will lose support for WhatsApp if their operating system is not updated from iOS 10. But, if users update to iOS 14, they will continue to enjoy using WhatsApp.
Here is how to update iOS:
1. Plug your device into power and connect to the internet with Wi-Fi.
2. Go to Settings > General, then tap Software Update.
3. Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now.