Method 1: Using the WhatsApp Application
Open WhatsApp and copy the mobile number you want to message.
Tap the "New Chat" button and select your name under "WhatsApp Contacts."
Paste the mobile number into the text box and click "Send."
Tap the mobile number; if the person is on WhatsApp, you'll see a "Chat with" option.
Tap "Chat with" to initiate a conversation.
Method 2: Creating a Link in Your Browser
Open your browser (on mobile or desktop).
Paste the following link in the address bar: https://api.whatsapp.com/send?phone=xxxxxxxxxx
Replace "xxxxxxxxxx" with the mobile number, including the country code (e.g., http://wa.me/919876543210).
Press Enter and tap "Continue to Chat" to open the WhatsApp chat window.
Method 3: Using the Truecaller App
Open the Truecaller app and search for the mobile number.
Scroll down and tap the WhatsApp icon next to the number.
This will open a WhatsApp chat window for that number.
Method 4: Using Google Assistant (Android)
Activate Google Assistant and say, "Send a WhatsApp to [mobile number with country code]." (e.g., "Send a WhatsApp to +919876543210").
Dictate the message you want to send.
Google Assistant will send the WhatsApp message to the specified number.
Method 5: Using Siri Shortcuts (iPhone)
Open the Siri Shortcuts app.
Go to "Settings" > "Shortcuts" and enable "Allow Untrusted Shortcuts."
Download the "WhatsApp to Non-Contact" shortcut (search online or use a provided link).
Add the shortcut and enter the mobile number to open a new WhatsApp chat window.