SIM card lock

Android is a new way to explore, and God can skip it directly.
Original works, please indicate the source! ! ! !
(The content is relatively low-level, I don’t believe that someone will reprint it, hahaha..., manual funny!)

Write the IMSI value of the required SIM card as follows, you can have another card, and query the IMSI value yourself.

Public final static String IMSI = "46000";//Mobile Card
 Public final static String IMSI1 = "46002";//Mobile Card
 Public final static String IMSI2 = "46001";//Unicom Card
 Public final static String IMSI3 = "46003";//Telecom card

Put the following piece of code in the onclick, you can achieve the click effect by satisfying these kinds of cards by clicking

TelephonyManager telManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
	/** Get the IMSI code of the SIM card
	  * SIM card unique identifier: IMSI: International Mobile Subscriber Identification Number (IMSI) is a sign that distinguishes mobile users.
	  * Stored in the SIM card, can be used to distinguish valid information from mobile users. IMSI consists of MCC, MNC, and MSIN, where MCC is the mobile country number and consists of 3 digits.
	  * Uniquely identify the country to which the mobile customer belongs, China is 460; MNC is the network id, consisting of 2 digits.
	  * It is used to identify the mobile network to which the mobile customer belongs. China Mobile is 00, China Unicom is 01, China Telecom is 03, and MSIN is the mobile customer identification code, which is composed of 11 digits of equal length.
	  * Uniquely identify mobile customers in the domestic GSM mobile communication network. So to distinguish between mobile or Unicom, just get the MNC field in the SIM card.
	 */

	

if (ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
		 / / User may turn off the required permissions
			return;
		}
		else{
			String imsi = telManager.getSubscriberId();
			boolean phoneCard = (imsi!=null&&(imsi.substring(0,5).equals(this.IMSI)
					|| imsi.substring(0,5).equals(this.IMSI1)
					|| imsi.substring(0,5).equals(this.IMSI2)
					|| imsi.substring(0,6).equals(this.IMSI3)
					|| imsi.substring(0,6).equals(this.IMSI4)
					|| imsi.substring(0,6).equals(this.IMSI5) )
			);
 //substring(0,5) Starting from the first one, taking five digits, (0,6) taking 6 digits