First: I just got this phone and the only thing I did was install a few requested updates -and Angry Birds,the update of which failed to download(thought I'd use a Mall's wifi. lol).I thought,perhaps that was causing this error,so I removed it,but,it happened again yesterday: Now and again(usually only happens once in a day,thankfully!),when I start up the phone,I see this screen that says something like this: "A custom OS has failed to install.Press volume up to continue,or voluime down to load normally." There is a big yellow caution triangle with an exclamation mark. After pressing the voulme down button,everything proceeeds as normal. Any ideas?