For those experiencing any difficulty with 2.2.1, there has been some recent changes. Go to a Sprint repair center, and have them update your phone. I had Sprint update my phone on Feb. 27, after I had used Samsung's website to initially update to 2.2.1, and it fixed several problems. I was still experiencing some difficulties after Feb. 27, so I went in today. They said Sprint had made some changes on March 1, so they updated my phone again. Everything seems to be running smoothly now.