HOw to pair the bluetooth in two devices using NFC - bluetooth

Question

I am trying to pair two devices
One is Google Nexus S which has the applicaion running which reads the mac address written over the tag which is stuck on the other phone which is not Android one .
Now i am trying to pair the devices as i tap on the other phone , my application reads the MAC address stored in the TAG and automatically creates the Bluetooth connection .
Everything is working fine but i am getting a pairing request or to match the keys on both the phones which should not come.
Here is the Bluetooth Segment where the connection is happening
private class ConnectThread extends Thread {
private final BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
private String mSocketType;
public ConnectThread(BluetoothDevice device, boolean secure) {
mmDevice = device;
BluetoothSocket tmp = null;
mSocketType = secure ? "Secure" : "Insecure";
// Get a BluetoothSocket for a connection with the
// given BluetoothDevice
try {
if (secure) {
tmp = device.createRfcommSocketToServiceRecord(
MY_UUID_SECURE);
} else {
tmp = device.createInsecureRfcommSocketToServiceRecord(
MY_UUID_INSECURE);
Log.d("CHECK", "Sucessfully created insecure socket");
}
} catch (IOException e) {
Log.e(TAG, "Socket Type: " + mSocketType + "create() failed", e);
}
mmSocket = tmp;
}
public void run() {
Log.i(TAG, "BEGIN mConnectThread SocketType:" + mSocketType);
setName("ConnectThread" + mSocketType);
// Always cancel discovery because it will slow down a connection
mAdapter.cancelDiscovery();
Log.d("CHECK", "Inside RUN");
// Make a connection to the BluetoothSocket
try {
// This is a blocking call and will only return on a
// successful connection or an exception
Log.d("CHECK", "Trying to connect");
mmSocket.connect();
Log.d("CHECK", "Tried to connect");
} catch (IOException e) {
// Close the socket
try {
mmSocket.close();
Log.d("CHECK", "Socket closed");
} catch (IOException e2) {
Log.e(TAG, "unable to close() " + mSocketType +
" socket during connection failure", e2);
}
Log.d("CHECK", "Connection failed");
connectionFailed();
return;
}
// Reset the ConnectThread because we're done
synchronized (BluetoothChatService.this) {
mConnectThread = null;
}
// Start the connected thread
connected(mmSocket, mmDevice, mSocketType);
Log.d("CHECK RESULT", "Sucessfully connected");
// Toast.makeText(BluetoothChatService.ConnectThread.this, "Sucessfully connected" , Toast.LENGTH_LONG).show();
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
Log.e(TAG, "close() of connect " + mSocketType + " socket failed", e);
}
}
}
I am trying for the insecure connection , but i dont know why it is asking for the pairing keys in both the phones.

Answer 1

Chek your bluetooth version because:
(sic) "For Bluetooth 2.1 devices, the link key will be encrypted, as encryption is mandatory. For legacy devices (pre Bluetooth 2.1 devices) the link key will be not be encrypted."