How to Send Receive SMS Online for Free

1. Go to a website that offers free text messaging service such as 411SMS, Chikka or TextEm.
2. Register your mobile number on the site that you choose. You will also need to provide a user name, password and email address. After you've completed the registration process, you will receive an email. Click on the link in the email to confirm your registration and log in to the website. 
3. Compose your text message. You are limited to 160 characters. Once you have composed your message, type the recipient's cell phone number into the appropriate field.
4. Enter the verification code and click 'Send.' The service will automatically send the message to your recipient. When the recipient replies to the text message, a notification will appear in a popup window on your desktop. Click on it to read the message.