No. The Java environment provides very good security measures that are accompanied by additional security measures taken in the mobile phone environment. MIDP Java is capable of a tight sandbox model with application access only to the phone user interface and memory area specifically assigned to MIDP Java application. The networking interface will be tuned to make sure no undesired access can be obtained. Typically, user confirmation is requested for any action that may cause costs to the user. JavaPhone API works together with the traditional Java and Personal Java security model.