Many people use softwares like smscaster to send sms messages . These softwares Require SIM to send messages but this method is not workable any more because the telecom companies block the mobile number from where bulk sms messages are being sent Moreover We cant use it for high scale usage because such Softwares can send maximum 400sms/Hour. In this situation use our web based services to send sms messages to your clients. We are providing high sms speed Proudly . we are handling 5 billion sms/month.You may check our Services Before purchasing .So play Before you pay.We are Providing free easy to use web based interface where you can paste your mobile numbers and than send sms messages. you can also use programming and use the provided api to automatically send messages .