It is absolutely possible to trick people without using your number on WhatsApp. You can activate WhatsApp with the number that is fake.
- Firstly Uninstall WhatsApp from your phone and install another one.
- Lock your messaging service and switch your device from airline to flight mode.
- Open WhatsApp to add the other number
- If you are not able to delivers the message to the server, it will ask you to select an alternate strategy to check upon.
- Choose that WhatsApp can authenticate via message, enter e-mail address and tap “Send” Selection.
- Afterwards, click “Cancel” to end the authentication.
Now use this trick and send message to people without using your number.