WhatsApp has officially dropped support for versions older than Android 5.0 .

If you must use an older version, sites like APKMirror verify the cryptographic signatures of files to ensure they haven't been tampered with.

Downloading WhatsApp from third-party sites—even trusted community experts—carries inherent risks:

Most users seeking this specific download are dealing with compatibility issues:

Go to Settings > Security on your device and toggle on "Unknown Sources" to allow installations from outside the Play Store.