iPhone 3G Weird Screen Freeze Issue

I have a relatively new iPhone (about a month and a half old) and am regularly experiencing a strange issue. I will be using my phone, anything from using built-in applications (mail, calendar, camera, maps, etc.) to other apps (AIM, Amazon, Facebook, NYTimes, etc.) and the phone will randomly freeze and the screen will show moving lines of color against a white screen. Sometimes if I let it go on its own it will eventually go back to normal, other times I have to reset it.

I have tried restoring a number of times, both from backup and as a new phone (attempt to avoid software issues), but continually experience the same problem. Is there something I am missing or is this an issue for the guys at the Apple store?
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SappbrostsConnect With a Mentor Commented:
if restoring the iphone to factory defaults doesnt help, there is not much else you could do without voiding the warranty.  I would take it back to the app store.
err, the apple store, not the "app store" lol
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