I got the Samsung Rant (M540) about a week ago. The very same night I got it, I took out the phone's battery, put it back in and tried starting it up. It wouldn't start, it was stuck on the loading screen. I carried it back to the sprint store where I purchased it and they gave me a new one. Three days after getting the new phone, I turned it off then later tried starting it back up and now the new phone was stuck on the loading screen. How do I fix it? And please don't tell me to call Sprint because I already did that and all they recommended was removing the battery and putting it back in, which obviously didn't work. Again, how do I get the phone un-stuck on the loading screen?