WhatsApp can now replace your iPhone’s default Phone and Messages apps.Apple introduced an option to change the default Calling and Messaging app on iPhones with iOS 18.2.WhatsApp is among the first to integrate these APIs, allowing it to be set as the default app for calls and texts on your iPhone.To set WhatsApp as the default calling and messaging app, open the Settings menu, navigate to Apps > Default apps, and select WhatsApp.