WhatsApp Messenger no longer supports Android 4.1.2 October 24, 2023 , the minimum requirement for the app was raised to Android 5.0 (Lollipop) or higher.

Verification Warning: Even if you successfully install an older APK, you may encounter a "This version of WhatsApp became out of date" message or be unable to verify your phone number via SMS. WhatsApp's servers often block older versions from connecting for security reasons. How to Install an Older APK

User Interface & Experience

The app didn't ask for a two-factor code or a biometric scan. It simply asked for a name. He typed "Home."