STEPS TO FOLLOW --
1.) Login to your Facebook Account and go to ChatsSMS Application
click here to go to sms application
2.) When the Request and Permission window opens then click on Allow button.
3.) In the next window select the country and country code where you want to send the SMS.
4.) In the Phone Number field give your Friends mobile number and in the SMS text field type your message that you want to send.
5.) After this click on Send SMS button and your SMS will be delivered within few seconds.
6.) The sent message will contain the First name of your Facebook with your message.