You can't just pay the etf and keep the phone that they just sold you at half price, on contract. You will have to return the phone as well or pay the difference in its value. In the end, if you return the phone, you are out $300 which is why I said you are screwing yourself over. Unless you fall into that 14 day return policy with no etf. But either way, you aren't keeping the phone for a discount.
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If you cancel the contract and they don't charge you the etf, they will make you return the phone or bill you the difference of the cost of the phone to make it the full purchase price. That's what you meant by your last message right?
Well for one, I have no issues with giving the phone back. I won't be using it. For two, you're incorrect. See chat convo with verizon:
Kristin: Okay, if you cancel the service for the iPhone 5c, this would also be canceling the phone number because the phone number is connected with the contract.
Sara : I understand. So the only thing i will be paying will be the ETF fee correct?
Sara : I think my local verizon store told me it was around $330
Kristin: Yes, that is correct.
Sara : You are awesome Kristin, thank you for your help

Kristin: You are very welcome! Do you have any more questions or concerns I can help you with?
Sara : The ETF fee is the cost of the rest of the device right?
Kristin: That depends, is the iPhone 5C an early Edge Upgrade?
Kristin: Let me take a look at your account for you.
Sara : No it isn't. I don't use edge
Sara : Its just simply an on contract device.
Kristin: Oh then yes that would be the cost to end the contract.
Sara : Im sorry to be redundant lol but that will be the ONLY fee that i pay, besides the activation fee for the 6 plus?
Kristin: I completely understand!

Kristin: Do you have any more questions or concerns I can help you with?
Sara : So willl that be the ONLY fee that i pay, besides the activation fee for the 6 plus?
Kristin: That is correct.
Sara : Someone told me that i would have to pay the ETF fee + the cost of the rest of the phone..is this true?
Kristin: No.
Sara : OKay Kristin, you've been awesome

Sara : Thanks for your help
Kristin: You are very welcome! Do you have any more questions or concerns I can help you with?
Kristin:

Sara : Well i just thought of one, lol sorry. When i pay the ETF, do i give the phone back to you guys?
Kristin: No, the phone is yours.