Abstract: A method and wireless mobile device invokes (802), under control of at least one of a plurality of applications, such as JAVA applications that run in a plurality of different execution environments, one or more common application interface (API), such as a JSR, that is common for use by the plurality of applications. The method and wireless mobile device also invoke (804) a zone permission check, in response to the invocation of the common API, that determines which execution environment a calling application is in, in response to zone identification data associated with each call in a group of calls in a call stack for the shared API. Once the environment is determined, a security permission check is invoked in a determined execution environment for the calling application to check permissions associated with the calling application.