I am sorry to hear that you are having issues with your new phone. We want you to love your new device. When is the device freezing? Is it doing it when you are trying to do any specific task? Have you downloaded any apps around the same time that it started? Since you just got the device you may want to do a hard reset and see if that works http://vz.to/151d8oM.Let us know if you need anymore assistance.
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Does the phone freeze at random or is it specific to one app? When it freezes you can hold down the volume down key and power button until you feel it vibrate. U might want to make sure your closing all your apps. To bring up multi tasking view, press and hold the back arrow icon for a few seconds. From there choose the app you want to close and press the back arrow, this should close the app out of the device memory. I would remove unwanted apps as well.