General help ASAP My sidekick randomly turning off AFTER I reboot it?

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http://androidforums.com – Yesterday my phone started acting weird. It would shut off for no reason and go from having a battery level of %80 to %15 within minutes. I'd be pulling the battery and hitting the power button every 2-3 hours. This morning, in addition to that problem, I had no data connectivity without wifi. I did a data factory reset and I had connection after but even before I downloaded apps again, it was still turning off on its own with no reason. Hours ago it got stuck on the loading screen, the phone logo would flash on the screen, but that's all it did and the phone was no use at all. I plugged it in (General)