If you have an existing version, try to back up your chats to local storage.
Look for "Lite" versions of other messaging apps that still support Android 4.4. whatsapp 4.4 4 apk download old version uptodown
Go to Settings > Security and toggle on "Unknown Sources." If you have an existing version, try to
Older phones lack the RAM or CPU power to run the modern, heavy versions of WhatsApp. If you have an existing version