Now sms's are very rare because of the emerging of whatsapp. Anyway if you don't have a data plan and need to send an urgent message to your friend, airtel will help you.
Use it only if your balance is below Re.1
Goto write message:
Just type
#freesms<space>Number<space>Message.
Ex : #freesms 7719866357 galvox
Then send it to 55444.
You can send group sms also by using this format :
Type
#groupsms<space>Mobile Number, Mobile Number<Space>Message.
Send it to 55444.
Now you might get "insufficient balance" error. But the message will definitely reach the destination.
Note: it is only for airtel.
