So this is my forth Epic 4g (first 2 had speaker issues). This one is refurbished and is having the same issues which seemed to come about after the froyo update (same thing happened on previous epic 4g). It's laggy in between exiting apps and returning to homescreen, gps takes forever to pick up signal, and the service goes in and out often. I have done master resets and nothing has helped! Any ideas? Im sure they are just going to give me another refurb if I take it to Sprint. Thanks!