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How to enable Android GUI to unlock SIM card PIN after boot?

I am a driver developer for Android. I implemented the function "Change SIM-code" (RIL writes AT-command to the modem). But when the status of the SIM card is “SIM_PIN” (a PIN code is required to unlock the SIM card), the function “Change SIM code” will fail. How to enable Android GUI to unlock SIM card after boot?

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If you were able to implement the sim-contact change function (AT + CLCK, I suppose), then I assume that you are able to implement the "Enter PIN" function (AT + CPIN = "pin_no").

Just call this function before your sim sim change function.

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