Steps to send bulk SMS in India:
1) You can click on first send SMS option in Menu.
2) 611332 this is your sender id.
3) You can type your contact Numbers or you can upload your file.
4) You can type your message content.
5) You can type campaign name. ( This is for your future reference only that SMS belong to campaign like Monsoon offer, Diwali offer etc)
6) Click on send SMS option.
Refer Following Screen Shot of Web Portal & Try to Send bulk SMS in India.