PIN number handling in j2me application

have to make a PIN protected j2me application, how can a default PIN number be applied to the application so that the user may have to change the PIN on开发者_运维百科 the first run.

PS: PIN number is not the actual PIN number of the phone,it is application specific PIN

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Do you need for the default PIN to be different for different clients? If not, then have a default PIN and let the client know the PIN and provide an option to change the PIN after login.