Also I was trying to get sipdroid to work and came across the download below. This will allow you to make outgoing calls to the U.S. and Canada. Just download that apk, create an account (can be done from the application) Confirm it through an E-mail address and viola you have a phone number and calling capabilities from your edge. I'm super stoked and am going to make a thread about it. Good luck with speaker troubles.
Here's a link to the thread I made about it with more clear instructions:
https://www.mobileread.com/forums/sho...d.php?t=144911