The following iPhone models are not compatible with WhatsApp as the last iOS update available for these device models is iOS 12.5.7: iPhone 5s iPhone 6 iPhone 6 Plus As per a report by 9To5, some sources also mentioned the following devices: iPhone 6s iPhone 6s Plus iPhone SE. Although, these models can run iOS 15.8.4. As long as they are updated to that version, WhatsApp will continue to function—at least until the next major support change. If you want to check your iPhone’s software version: Go to the settings of your iPhone Tap on General Select About If your device cannot update to iOS 15.1 or higher, WhatsApp will no longer work. To continue using the app, you will soon need to switch to a supported device