I have a galaxy 2 10.1 (P5113). Today, it started an upgrade - I'm assuming to jelly bean. It got to 24% and stopped, then closed. Later when I turned it on, I got a message saying the upgrade had failed and to try with kies. This was a Christmas present, so I'm just getting familiar with the tablet. My s3 phone upgraded with no problems a week ago. What do I need to do to upgrade? Thanks This is a stock tablet, not rooted.