Not able to send SMS with SIM800L - Call is working

I got myself into a rather strange problem while working with SIM800L through AT commands. I am able to place calls and even read messages but when I send a message 

using putty terminal  



> sample message [Ctrl+Z]

I get the following response 

Everything looks good on the terminal, but I did not receive a text message. Surprisingly I also noticed that my network provided (Airtel) has also charged me for sending an SMS but I never did receive it on any number. 


After digging into the AT command spec sheet of SIM800L I found that we have to set the message type using the following command


This has solved my problem :-)