Speakerphone no longer works

What do you have installed?

I had an issue where I couldn't view pictures sent to me via texting. I emailed the dev of bitesms and asked why that would occur. They said that something I had installed was messing it up. They had me open sbsettings, and at the bottom of the main screen it has a choice about mobile substrate add ons (or something like that). They told me to turn them all off except the bite ones and see if the issue was still there, and if not then turn them back on one by one to see which add on was causing the error. You may want to try this to see if you can figure out what is causing the problem. (and then remove it!)

That was the first time I messed with that add ons screen, nothing bad happened and I was able to fix the problem. You may want to ask around and make sure that doing what I suggested doesnt screw up your phone.