Use APKPure App
Get ToWhatsApp old version APK for Android
अपने फोन में संपर्क सहेजे बिना व्हाट्सएप संदेश भेजें
Open a chat message in WhatsApp with any number, you don't need to save it on your contacts.
Just open and chat.
You can send messages to anyone who is not in your phone’s contacts.