The new security model introduced in MIDP 2.0 is protects the phone and the user from malicious applications by restricting access to APIs that are considered sensitive. In general the midlet is granted only minimal access to these APIs, meaning that the user is asked for confirmation every time the API is accessed. The user can manually change the default permissions a little through the Application Manager (on S60 devices use the separate Application Manager; on Series 40 devices you can change the application settings from the through the Application Menu).
The developer can also sign the MIDlet with a certificate so the MIDlet has less restricted access to the sensitive APIs. The corresponding root certificate has to be available on the target phone; otherwise the installation will fail. The Java Verified certificate is widely available on devices from all manufacturers.
Your MIDlet will be signed with this certificate after it passes the Java Verified testing. The testing ... more.
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