I just got a replacement yesterday for my phone since my old one would not connect to GPS. All was fine, I rooted and installed Radioactive FroYo 1.8.9 (or what ever the newest is) plug my phone in at 11pm, wake up at 8am and my phone wasn't fully charged. I unplugged it and checked my email which only took a minute and it dropped to about 50%. WTF I thought, so I plug it into my laptop and it detected it, then I unplugged it, then I plugged it in again and nothing happened, wiggled the cord around and it would go in and out of being connected to the computer. So this phone has a bad USB or something, which would explain why a couple times last night I heard the single chime coming from my phone. So now I have to reflash my phone and have Sprint order me another phone.