WhatsApp Self Verification

com.whatsapp.VerifySms.java

paramSmsManager.sendDataMessage(
   (String)localObject1,        // Destination address: Phone number entered by the user
   null,                        // Source address: null means the current default SMSC is used
   A,                           // Destination port: Random number between 16000 and 16099
   paramString.getBytes(),      // Data: "WhatsApp <code> WhatsApp internal use - safe to discard"
   (PendingIntent)localObject2, // Sent Intent: Not important for this discussion
   null                         // Delivery Intent: Not important for this discussion
);