SMS Gateway to send SMS for indian mobile service providers

Hi I do not want a SMS solution to be sent from mobile phones I need a SMS Gateway to send lots of SMS each day, more than a lack of SMS usually. I am primarily focussing to send SMS to all GSM and CDMA mobiles in India to service providers like Airtel, Aircel, Vodafone, Reliance,TataIndicom etc. I also wish to change the sender name in the SMS, I beleive it is possible when SMS is sent from the web. I would also interested in seeing the delivery report of the SMS. I do not want this Gateway to be dependent on other's which entitles me to a monthly suscription or a cost per sms. I want this sms to be totally free after this script is setup. I am new to this Gateway concepts. However I still wish to know, if I can host the gateway script you deliver will work in shared hosting environment. If you have another solution which suits the requirements, please let me know.