I too am having an issue where the phone doesn't ring. Sometimes it rings, sometimes it doesn't. This is new with JB. I am also having an issue with messaging. The notification in the notification bar will not go away. It says I have 112 new messages. I have uninstalled and reinstalled my messaging app. The app I am using says it supports JB. I am not getting any picture messages and I am not sure if I am getting all the text messages. The app will often just go blank and there will me a few minutes where the screen turns black and is inoperable. I then get a message saying that it is not responding. All the apps as well as the phone seem to be at bit quirky. When I reboot the phone it stays on the black screen with the Google text on it for nearly two minutes before the reboot starts. This is also new. Also, still having same issues with call quality, in fact they may be worse. Still having a lot of static and background noises as I did with ice cream sandwich but now I have a low pitched humm that is taking over the calls. Data connectivity about the same. Anyone else experience this? I have rebooted, pulled battery as well as sim card. Any suggestions or help would greatly be appreciated.