Have you tried to plug in headphones? Obviously, and I'm sure you have but it has to be said, check your master volume control in the settings. You can get to a small menu by pressing up or down on the volume control and touching the settings button in the popup, but I'd rather you went to the sounds control by opening the menu and going to it that way. One this will tell you if you are muted in some way, while I'm not sure the popup menu will. Just for S&G I'd max them all out. You can readjust them later. What it sounds like is the phone thinks it is still connected to your Bluetooth headset. Did the battery for your Bluetooth device die while on the call or it just cut out as though the two were not connected anymore? Either way you shouldn't be in the situation you're in, but I'm trying to get a full picture and cover all the bases I can think of, right? To be sure your speakers aren't blown or some other remote possibility with the hardware set an alarm and see if the phone produces any sound. It should still alarm even if it thinks it's connected to Bluetooth because alarms are not transmitted via Bluetooth or through headphones. After your sure the device will make sound, via the alarm test, the next step would be to do things to persuade your device to stop thinking it is connected to your Bluetooth device, if that is the case. I would break all Bluetooth connections by deleting them. Then turn off Bluetooth in the settings and restart the phone. If the sound is back great. If not I might try to reestablish a Bluetooth connection with one of your devices and see if it will transmit sounds even if it's not making sound it should still transmit them and if you've turned up all of your volumes and ensured nothing is muted, they should come through no problem. If that doesn't bring the sound back I'd take it to a Corp. store with tech support. With or without insurance they will at least look at the device and attempt to diagnose the problem usually. Be sure to post back.
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