From Gmail, click on Settings, and go to the Labs tab. Scroll down until you see Text Messaging (SMS) in Chat and select Enable. Also enable the SMS in Chat gadget and then Save Changes. Log into your Gmail account. In the Send SMS box above Chat, enter the phone number you want to send a SMS to. Hit the Enter Button. In the dialog box, enter Contact name of the SMS recipient and check that country and phone number are correct, then, click Save. Type your message in the chat window and hit Enter. Your message will be sent to the phone number you entered. If your contact replies, the text message response will appear as a reply in Chat. These conversations are stored in your Chat history just like regular chats. Keep chating and enjoy, I like Gmail.