Right, my phone updated and now it's not letting me do anything. I followed the steps on the Samsung site and everything seemed to go fine, but now I can't select any apps or anything. The touch screen only responds for switching home screens, and it barely does that. Every minute, the screen goes black (everything except the battery meter and the time), then comes back with the 'no service' symbol, which is replaced after a couple seconds with the bars. Restarting didn't help.