title: How to read MSISDN from sim card by SIM_IO?
body: <p>I need to read MSISDN in android, but we must use .c to finish it.
  I open a socket to send <code>RIL_REQUEST_SIM_IO</code> to ril. Here is the log.</p>
  
  <pre><code>D/RILC    (  106): [0004]&gt; SIM_IO (cmd=0xB2,efid=0x6F40,path=3F007F10,1,4,30,(null),pin2=(null),aid=(null))
  ...
  D/RILC    (  106): [0004]&lt; SIM_IO {sw1=0x90,sw2=0x0,ffffffffffffffffffffffffffff0891684125205260f5ffffffffff}
  </code></pre>
  
  <p>Did I use the right parameters (P1 = 1, P2 = 4, P3 = 30)?</p>
  
  <p>And how can I get the mobile phone number by response?</p>
  
  <p>Thank you!☺</p>