If you have an existing version, try to back up your chats to local storage.
You cannot "downgrade" an app; you must delete the newer version first. whatsapp 4.4 4 apk download old version uptodown
Older versions often have a smaller file size, saving precious internal memory. If you have an existing version, try to
Search for "WhatsApp Messenger" on the Uptodown website. If you have an existing version