An interruption of the network connection during the MIDlet run must also be considered and treated appropriately. Check that your MIDlet handles possible network errors and informs the user about them.
The application must also handle situations where connection is not allowed and close the connection after the session is over.
The system usually closes network connections when the application is about to close. However, it is recommended that the network connection be either disconnected by the user or programmatically before the application closes.
Check that:
Network exceptions are handled and the user is notified about them.
The network connection is closed when it is not needed anymore and/or the application is closing.