WhatsApp will stop functioning on older smartphones starting June 1, 2025, due to a software update raising minimum requirements.Affected iPhones must run iOS 15.1 or later, while Android devices need Android 5.1 or newer to continue using WhatsApp.Models like iPhone 5s and Samsung Galaxy S4 will lose support, with security concerns cited for dropping support for outdated devices.Users can upgrade their devices, update software, or switch to alternative apps like Telegram and Signal as options to stay connected.