Don't know if this helps or not, but i haven't loaded any new apps for months and the problem just started. Also, it happened last time after powering phone on in an area with no reception. Don't know if anyone else has noticed, but phone acts REALLY sluggish when doing this. It also happened once when i tried attaching a photo and hit send before it converted the photo. On that occasion i deleted that particular photo and it fixed the problem until yesterday's occurrence. Maybe those circumstances will tell someone much smarter than i something.