Problems with EPIC, how do I get a new one

[master4g]

It is a pretty common thing around here to hear something like, "I am on my second EPIC" or, "I went through 4 diamonds before I got a touch pro" etc.

My question is : HOW?

I don't have TEP, can I just walk into a sprint store, and say, " my epic has giving me these problems: GPS problems, and calls have been dropping more than my previous phones, Can you Swap my phone for a new one? (without having to pay a $35 restocking fee)"

It has been less than 30 days since I bought the phone

Also, a side question, is sprint able to see the number of dropped calls a person had? so I can just tell them, "look it up on your system, I have had xx many dropped calls in the last 2 weeks"

Thanks in advance