I once thought I had rooted my phone but, it never worked. Just received the message to update so accepted. It started to update the download bar gets about a third of the way across and it stops. A yield sign comes up with an exclamation point in the middle of it with the little green guy standing next to it???? I tried twice pulling the battery and restarting with no help. Once I turn it back on no matter what within minutes it shuts down and tries to start downloading again. Keeps repeating the same process. Thoughts?