Unable to give provider name by using SMS Api Extension
Sandeep are you looking to setup SMS in CiviCRM? 

We successfully setup SMS in CiviCRM 4.6.8 using Twillio - https://www.twilio.com/ 

We followed the exact steps here - http://wiki.civicrm.org/confluence/display/CRMDOC/Setting+up+a+SMS+Provider+for+CiviSMS

and use From=614111111111 where 61 is the country code (Australia in our case).