Direct Messaging
One of the biggest annoyances of WhatsApp, which I have to explain to everyone new to the app (a number that's dwindling every day), is that you can only start chats with numbers that are saved as phone contacts. The only exception is if you receive a contact's number from someone else inside a WhatsApp chat, in which case you can start talking to them without adding them to your address book first.
However, there are a few ways to bypass this limitation, If you're not aware of these, follow the steps mentioned below
1. Enter a number to which you are going to send message
2. Type your text message and tap on send via whatsApp button.
3. This will take you to the your Whats app chat window
