Abstract: Communication between Secure Elements and the Service providers have always been a matter of concern in terms of security for exchanging sensitive information in secure manner. Most common requirement for this information exchange is the protocols that are supported by different applications on secure elements or applications that interact with the secure elements. This paper describes how protocol discovery mechanism proposed by global platform works with SIM based applications (for example NFC application interacting with SIM and other applications) or application interacting with the cards to exchange information about supported protocols in the applications and provide/deny access to services based upon discovery of protocols.