: Before uninstalling your current version, create a backup to Google Drive or local storage. Enable Unknown Sources Settings > Apps > Special App Access > Install unknown apps and allow your browser to install APKs. Uninstall Current Version

While there is no official "version 8.1.0" for WhatsApp (the app currently uses version numbers like 2.26.x), users often search for this specific version when looking for an APK compatible with . Compatibility for Android 8.1

: Another source for various older builds, such as version 2.22.8.1. Installation Steps