Free sms @ Airtel, Reliance, Docomo, Videocon
1. If you don't have a twitter account please create one.
2. Open your twitter account and add your mobile number. You can add mobile number using the link https://twitter.com/settings/devices. Add number and press active phone.
3. Now verify your mobile number. For that you need to send a SMS with keyword 'GO' to 53000. Twitter or mobile providers (other than Gulf countries) doesn't charge for this.
4. Once your mobile number is verified, you and your friend should follow each other. Now you can start sending messages. The format to send message is
@<friends twitter ID> <Your Message> to 53000
For example, you want to send message 'How are you !’ to your friend Chand2 (Twitter id: chand2like), type
@chand2like How are you !
In your mobile and send it to
53000
Then your friend will immediately receive it as
How are you !
Note: The maximum length of message that can be send is 140. And you can send any number message a day.
Update: If any of the user register at DNT service, the sms may not receive. And you can’t send sms after 9pm and before 8am. That means you can’t send messages for 11 hours (That is from 9pm to 8am). More over in peak hour time it may experience delay.