判断SIM卡所属的运营商

TelephonyManager mTelephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
int simState = mTelephonyManager.getSimState();
if (simState != TelephonyManager.SIM_STATE_READY) {
    // unknown sim op
}

String simOp = mTelephonyManager.getSimOperator();
if ("46000".equals(simOp) || "46002".equals(simOp) || "46007".equals(simOp)) {
// 移动
} else if ("46001".equals(simOp)) {
// 联通
} else if ("46003".equals(simOp)) {
// 电信
}

需要权限  android.permission.READ_PHONE_STATE