android - Check SIMCards's PIN -


so i've research subject , didn't information, though did read few threads here check sim pin sdk android , ask user sim card pin neither of them answer question - app i'm trying write based on ussd , run on devices simcards.

i read thread use system pin dialog in android application, i'm not trying overwrite os, i'm trying write simple app can check entered string against simcard pin. on last thread, user (a.ch.) said trying access or check simcard pin number not allowed os (at least without modifications, suppose). can guys confirm or give me link mentions prohibition?

also, possible to, using ussd, check pin? example, know mmi code change pin: **04*current pin * new pin * new pin#. , returns fail or sucess messages, , if make current pin = new pin, can identify if pin introduced correct or not, see on text message. smartphone return info in attribute can check? how can access return code?

i need can :)


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