Handles communication with SIM, USIM, and RUIM (CDMA SIM) cards. Get the IMSI of the SIM card. The IMSI. Returns the ID of the network operator that issued the SIM card, formatted as a 5 or 6-digit MCC/MNC code (ex "310410"). The operator ID formatted as an MCC/MNC code. Send the PUK and a new PIN to unlock the SIM card. The PUK code. The PIN code. Send the PIN to unlock the SIM card. The PIN code. Enable or disable the PIN checking. The PIN code. True to enable PIN checking. Change the PIN code. The current PIN code. The new PIN code. An obfuscated SIM identifier based on the IMSI or the ICCID. This may be available before the PIN has been entered depending on the device itself.