General Possible defective Ultra?

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http://androidforums.com – My girlfriend has a Ultra on Boost,it worked fine for about 7 months and now it acts up.Freezes,requires a battery pull,sends multiple texts messages,battery is terrible and goes down to 50% within 2-3 hours from fully charged.I'be called Samsung and they told me to factory reset..I think the latest update gave it more problems.I've called Samsung twice and want me to send it in so they can factory reset.Anyway I can get Samsung to send me a new phone? (General)