Many times, we used the WhatsApp numbers for text and before any message sending this is important to save the number in our phone book. I used many times the commercial number or helpline where I got some information, that was for single text only. This type of awkward thing much bored for me. Although sometimes I avoided texting through WhatsApp.
Another thing that told by @eduardog,
I wouldn't like to receive WhatsApp message from an anonymous number. By the way.
I agree with him. But we can’t see only a single thing because the overall hunt is very great that provides a platform where without saving the number, we can easily use this wand tool.
Good Job @camzy