If you manage to install a WhatsApp version from the Android 4.2.2 era, you can expect a simpler set of features, which often included:

Malicious actors frequently rename malware files to look like popular old apps (e.g., whatsapp-4-2-2.apk ). Always double-check the file size and developer signature before hitting install.

A user downloading WhatsApp v4.2.2 today will likely be met with a "Date Incorrect" error or a prompt to update the application immediately, rendering the download futile for communication purposes.