Older Android versions require explicit permission to install applications outside of the Google Play Store. Open your device .
If you decide to proceed, always, always, always compare the signature of the APK you download with the official one from WhatsApp. If you don't know how to do this, stick to the absolute most trusted APK mirror sites like APKMirror. whatsapp 4.2.2 apk download old version
WhatsApp version 4.2.2 is extremely outdated (released around 2013-2014 ). It will not work today because: whatsapp 4.2.2 apk download old version
