My device froze up this afternoon unexpectedly and has not moved beyond the LG start up screen. I've tried removing the battery and the sim card with no success. Any assistance you're able to provide would be greatly appreciated.
Unfortunately, this isn't the first time I've heard of this happening. You'll want to make sure all of these steps have been followed first. If you're still unable to get it working you'll need the device exchanged just as snn_555 recommended.