I wish to know if there is any web service using which i can sens SMS. The Scenario is like my server needs to send an ACK msg to a client mobile phone. Are you aware of any such free web service ? And have any of you worked with this ?
http://www.webservicex.com/sendsmsworld.asmx?WSDL

This site did not work for me. Although my carrier is listed in its documentation.