user1441: I was wondering if this can be done. I got a Nokia 106 and am trying to make it talk, but the audio jack doesn't seem to cooperate and the Fbus pins are right under the SIM slot, which is right under the battery. Any advice?
Added: It seems that it talks AT commands, since it is a GSM model, but I'm not 100% positive.

user316: Here's the picture of the Nokia FBUS connector from your link:
 
And here's a (slightly dubious) method of connection from some random web page
 
which goes on to say

The F-bus protocol uses 115,200bps so we can easily use the Arduino’s serial function to communication with the phone. All you need to is hook up the phones TX to the Arduino’s RX and then use a resistor divider (I choose 330 ohm resistors) to connect the Arduino’s TX to the phones RX as shown above.

That page goes on to show how to use an Arduino to get the phone to send SMS text messages.
Sources:  

http://www.insidegadgets.com/2013/01/12/how-to-use-nokia-f-bus-to-send-an-sms-message/
http://forum.gsmhosting.com/vbb/f148/nokia-105-new-100-working-solution-1731398/


1441: <p>I was wondering if this can be done. I got a Nokia 106 and am trying to make it talk, but the audio jack doesn't seem to cooperate and the Fbus pins are right under the SIM slot, which is right under the battery. Any advice?</p>

<p>Added: It seems that it talks AT commands, since it is a GSM model, but I'm not 100% positive.</p>
 316: <p>Here's the picture of the Nokia FBUS connector from your link:
<img src="https://i.stack.imgur.com/mPvXc.png" alt="enter image description here">  </p>

<p>And here's a (slightly dubious) method of connection from some random web page
<img src="https://i.stack.imgur.com/2l8Jh.png" alt="enter image description here">  </p>

<p>which goes on to say</p>

<blockquote>
  <p>The F-bus protocol uses 115,200bps so we can easily use the Arduino’s serial function to communication with the phone. All you need to is hook up the phones TX to the Arduino’s RX and then use a resistor divider (I choose 330 ohm resistors) to connect the Arduino’s TX to the phones RX as shown above.</p>
</blockquote>

<p>That page goes on to show how to use an Arduino to get the phone to send SMS text messages.</p>

<p>Sources:  </p>

<ul>
<li><a href="http://www.insidegadgets.com/2013/01/12/how-to-use-nokia-f-bus-to-send-an-sms-message/" rel="nofollow noreferrer">http://www.insidegadgets.com/2013/01/12/how-to-use-nokia-f-bus-to-send-an-sms-message/</a></li>
<li><a href="http://forum.gsmhosting.com/vbb/f148/nokia-105-new-100-working-solution-1731398/" rel="nofollow noreferrer">http://forum.gsmhosting.com/vbb/f148/nokia-105-new-100-working-solution-1731398/</a></li>
</ul>
