WhatsApp is a messaging app with over 1 billion active users. It’s one of the most popular messaging apps on the market, and it’s also one of the most versatile. If you want to send a message to all of your contacts in WhatsApp, there are a few different ways to do it. The first way is to go to your contact list and select “Send Message.” Then, type in your message and hit “Send.” The second way is to go to the main menu in WhatsApp and select “Settings.” Under “Messages,” select “All Contacts.” Then, type in your message and hit “Send.” The third way is to go directly to your contact list in WhatsApp and select “Message” from the main menu. Then, type in your message and hit “Send.” ..